21102012012201 has 16 divisors (see below), whose sum is σ = 28941378816000. Its totient is φ = 13669633361808.

The previous prime is 21102012012163. The next prime is 21102012012227. The reversal of 21102012012201 is 10221021020112.

It is not a de Polignac number, because 21102012012201 - 2³⁴ = 21084832143017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21102012012281) 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, 538324501 + ... + 538363698.

It is an arithmetic number, because the mean of its divisors is an integer number (1808836176000).

Almost surely, 2^{21102012012201} is an apocalyptic number.

It is an amenable number.

21102012012201 is a deficient number, since it is larger than the sum of its proper divisors (7839366803799).

21102012012201 is a wasteful number, since it uses less digits than its factorization.

21102012012201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1076688388.

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

Adding to 21102012012201 its reverse (10221021020112), we get a palindrome (31323033032313).

The spelling of 21102012012201 in words is "twenty-one trillion, one hundred two billion, twelve million, twelve thousand, two hundred one".