21102010011212 has 48 divisors (see below), whose sum is σ = 41539946360640. Its totient is φ = 9312251574528.

The previous prime is 21102010011193. The next prime is 21102010011293. The reversal of 21102010011212 is 21211001020112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67773683 + ... + 68084330.

It is an arithmetic number, because the mean of its divisors is an integer number (865415549180).

Almost surely, 2^{21102010011212} is an apocalyptic number.

It is an amenable number.

21102010011212 is a deficient number, since it is larger than the sum of its proper divisors (20437936349428).

21102010011212 is a wasteful number, since it uses less digits than its factorization.

21102010011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135858162 (or 135858160 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21102010011212 its reverse (21211001020112), we get a palindrome (42313011031324).

The spelling of 21102010011212 in words is "twenty-one trillion, one hundred two billion, ten million, eleven thousand, two hundred twelve".