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12221120012221 = 201730012019013
BaseRepresentation
bin1011000111010111001110…
…0001000101111110111101
31121021022211212101120110201
42301311303201011332331
53100212323210342341
641554145515203501
72400642514056121
oct261656341057675
947238755346421
1012221120012221
113991a4770885a
121454650446591
136a85a64531c3
14303710a13581
15162d755eb331
hexb1d73845fbd

12221120012221 has 8 divisors (see below), whose sum is σ = 12231259496504. Its totient is φ = 12210984576000.

The previous prime is 12221120012183. The next prime is 12221120012251. The reversal of 12221120012221 is 12221002112221.

It can be written as a sum of positive squares in 4 ways, for example, as 1152284168025 + 11068835844196 = 1073445^2 + 3326986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12221120012221 - 27 = 12221120012093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221120012251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5043511 + ... + 7062523.

It is an arithmetic number, because the mean of its divisors is an integer number (1528907437063).

Almost surely, 212221120012221 is an apocalyptic number.

It is an amenable number.

12221120012221 is a deficient number, since it is larger than the sum of its proper divisors (10139484283).

12221120012221 is a wasteful number, since it uses less digits than its factorization.

12221120012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024031.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12221120012221 its reverse (12221002112221), we get a palindrome (24442122124442).

The spelling of 12221120012221 in words is "twelve trillion, two hundred twenty-one billion, one hundred twenty million, twelve thousand, two hundred twenty-one".

Divisors: 1 2017 3001 2019013 6053017 4072349221 6059058013 12221120012221