21010000000012 has 12 divisors (see below), whose sum is σ = 37549787234400. Its totient is φ = 10281489361616.

The previous prime is 21009999999931. The next prime is 21010000000019. The reversal of 21010000000012 is 21000000001012.

It is a junction number, because it is equal to n+sod(n) for n = 21009999999932 and 21010000000004.

It is not an unprimeable number, because it can be changed into a prime (21010000000019) 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, 55877659387 + ... + 55877659762.

It is an arithmetic number, because the mean of its divisors is an integer number (3129148936200).

Almost surely, 2^{21010000000012} is an apocalyptic number.

It is an amenable number.

21010000000012 is a deficient number, since it is larger than the sum of its proper divisors (16539787234388).

21010000000012 is a wasteful number, since it uses less digits than its factorization.

21010000000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111755319200 (or 111755319198 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 21010000000012 its reverse (21000000001012), we get a palindrome (42010000001024).

The spelling of 21010000000012 in words is "twenty-one trillion, ten billion, twelve", and thus it is an aban number and an uban number.