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12221201011212 = 2232547620617561
BaseRepresentation
bin1011000111010111100001…
…0110000101001000001100
31121021100001111210202012100
42301311320112011020030
53100213004424324322
641554201531235100
72400644516412564
oct261657026051014
947240044722170
1012221201011212
113991a89401576
1214546735a8a90
136a85ba1731bb
1430371b699da4
15162d7c79adac
hexb1d7858520c

12221201011212 has 36 divisors (see below), whose sum is σ = 30948956581816. Its totient is φ = 4066286253120.

The previous prime is 12221201011199. The next prime is 12221201011219. The reversal of 12221201011212 is 21211010212221.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×122212010112122 (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (12221201011219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 310289089 + ... + 310328472.

Almost surely, 212221201011212 is an apocalyptic number.

12221201011212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12221201011212 is an abundant number, since it is smaller than the sum of its proper divisors (18727755570604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12221201011212 is a wasteful number, since it uses less digits than its factorization.

12221201011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620618118 (or 620618113 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 12221201011212 its reverse (21211010212221), we get a palindrome (33432211223433).

The spelling of 12221201011212 in words is "twelve trillion, two hundred twenty-one billion, two hundred one million, eleven thousand, two hundred twelve".

Divisors: 1 2 3 4 6 9 12 18 36 547 1094 1641 2188 3282 4923 6564 9846 19692 620617561 1241235122 1861852683 2482470244 3723705366 5585558049 7447410732 11171116098 22342232196 339477805867 678955611734 1018433417601 1357911223468 2036866835202 3055300252803 4073733670404 6110600505606 12221201011212