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21212101122 = 233535350187
BaseRepresentation
bin10011110000010101…
…101111101000000010
32000202022022101101220
4103300111233220002
5321420244213442
613424504535510
71350440612262
oct236025575002
960668271356
1021212101122
118aa5750593
12413ba81596
132000848134
1410532857a2
15842396eec
hex4f056fa02

21212101122 has 8 divisors (see below), whose sum is σ = 42424202256. Its totient is φ = 7070700372.

The previous prime is 21212101109. The next prime is 21212101123. The reversal of 21212101122 is 22110121212.

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

21212101122 is an admirable number.

It is a super-3 number, since 3×212121011223 (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21212101123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767675088 + ... + 1767675099.

It is an arithmetic number, because the mean of its divisors is an integer number (5303025282).

Almost surely, 221212101122 is an apocalyptic number.

21212101122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

21212101122 is a wasteful number, since it uses less digits than its factorization.

21212101122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535350192.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21212101122 its reverse (22110121212), we get a palindrome (43322222334).

The spelling of 21212101122 in words is "twenty-one billion, two hundred twelve million, one hundred one thousand, one hundred twenty-two".

Divisors: 1 2 3 6 3535350187 7070700374 10606050561 21212101122