21020211000012 has 24 divisors (see below), whose sum is σ = 56053896000256. Its totient is φ = 6005774571408.

The previous prime is 21020210999981. The next prime is 21020211000023. The reversal of 21020211000012 is 21000011202012.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125120303488 + ... + 125120303655.

Almost surely, 2^{21020211000012} is an apocalyptic number.

It is an amenable number.

21020211000012 is an abundant number, since it is smaller than the sum of its proper divisors (35033685000244).

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

21020211000012 is a wasteful number, since it uses less digits than its factorization.

21020211000012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250240607157 (or 250240607155 counting only the distinct ones).

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

Adding to 21020211000012 its reverse (21000011202012), we get a palindrome (42020222202024).

The spelling of 21020211000012 in words is "twenty-one trillion, twenty billion, two hundred eleven million, twelve", and thus it is an aban number.