21010122000012 has 24 divisors (see below), whose sum is σ = 49056586177536. Its totient is φ = 6998664260368.

The previous prime is 21010121999969. The next prime is 21010122000017. The reversal of 21010122000012 is 21000022101012.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (21010122000017) 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, 588698868 + ... + 588734555.

It is an arithmetic number, because the mean of its divisors is an integer number (2044024424064).

Almost surely, 2^{21010122000012} is an apocalyptic number.

It is an amenable number.

21010122000012 is an abundant number, since it is smaller than the sum of its proper divisors (28046464177524).

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

21010122000012 is a wasteful number, since it uses less digits than its factorization.

21010122000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177434917 (or 1177434915 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21010122000012 its reverse (21000022101012), we get a palindrome (42010144101024).

The spelling of 21010122000012 in words is "twenty-one trillion, ten billion, one hundred twenty-two million, twelve", and thus it is an aban number.