21211022011212 has 54 divisors (see below), whose sum is σ = 58934113740684. Its totient is φ = 6427582426320.

The previous prime is 21211022011177. The next prime is 21211022011301.

21211022011212 is a `hidden beast` number, since 21 + 211 + 0 + 220 + 1 + 1 + 212 = 666.

21211022011212 is nontrivially palindromic in base 10.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2434685958 + ... + 2434694669.

Almost surely, 2^{21211022011212} is an apocalyptic number.

21211022011212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21211022011212 is an abundant number, since it is smaller than the sum of its proper divisors (37723091729472).

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

21211022011212 is a wasteful number, since it uses less digits than its factorization.

21211022011212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4869380659 (or 4869380643 counting only the distinct ones).

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

It can be divided in two parts, 2121102 and 2011212, that added together give a palindrome (4132314).

The spelling of 21211022011212 in words is "twenty-one trillion, two hundred eleven billion, twenty-two million, eleven thousand, two hundred twelve".