210021211122012 has 36 divisors (see below), whose sum is σ = 532310239781320. Its totient is φ = 69819383853792.

The previous prime is 210021211122011. The next prime is 210021211122089. The reversal of 210021211122012 is 210221112120012.

210021211122012 is a `hidden beast` number, since 210 + 0 + 21 + 211 + 1 + 220 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210021211122011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7820258062 + ... + 7820284917.

Almost surely, 2^{210021211122012} is an apocalyptic number.

It is an amenable number.

210021211122012 is an abundant number, since it is smaller than the sum of its proper divisors (322289028659308).

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

210021211122012 is a wasteful number, since it uses less digits than its factorization.

210021211122012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15640543362 (or 15640543357 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 210021211122012 its reverse (210221112120012), we get a palindrome (420242323242024).

The spelling of 210021211122012 in words is "two hundred ten trillion, twenty-one billion, two hundred eleven million, one hundred twenty-two thousand, twelve".