21102010212012 has 48 divisors (see below), whose sum is σ = 49606155715200. Its totient is φ = 6981441505920.

The previous prime is 21102010212011. The next prime is 21102010212067. The reversal of 21102010212012 is 21021201020112.

It is a junction number, because it is equal to n+sod(n) for n = 21102010211982 and 21102010212000.

It is not an unprimeable number, because it can be changed into a prime (21102010212011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4185064 + ... + 7727792.

It is an arithmetic number, because the mean of its divisors is an integer number (1033461577400).

Almost surely, 2^{21102010212012} is an apocalyptic number.

It is an amenable number.

21102010212012 is an abundant number, since it is smaller than the sum of its proper divisors (28504145503188).

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

21102010212012 is a wasteful number, since it uses less digits than its factorization.

21102010212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546446 (or 3546444 counting only the distinct ones).

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

Adding to 21102010212012 its reverse (21021201020112), we get a palindrome (42123211232124).

The spelling of 21102010212012 in words is "twenty-one trillion, one hundred two billion, ten million, two hundred twelve thousand, twelve".