21211001012012 has 24 divisors (see below), whose sum is σ = 42598026942240. Its totient is φ = 9052709379840.

The previous prime is 21211001012009. The next prime is 21211001012021. The reversal of 21211001012012 is 21021010011212.

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 1571644187 + ... + 1571657682.

It is an arithmetic number, because the mean of its divisors is an integer number (1774917789260).

Almost surely, 2^{21211001012012} is an apocalyptic number.

It is an amenable number.

21211001012012 is an abundant number, since it is smaller than the sum of its proper divisors (21387025930228).

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

21211001012012 is a wasteful number, since it uses less digits than its factorization.

21211001012012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3143302121 (or 3143302119 counting only the distinct ones).

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

Adding to 21211001012012 its reverse (21021010011212), we get a palindrome (42232011023224).

The spelling of 21211001012012 in words is "twenty-one trillion, two hundred eleven billion, one million, twelve thousand, twelve".