21112220312232 has 64 divisors (see below), whose sum is σ = 61604047134720. Its totient is φ = 5903721179328.

The previous prime is 21112220312213. The next prime is 21112220312251. The reversal of 21112220312232 is 23221302221112.

It is an interprime number because it is at equal distance from previous prime (21112220312213) and next prime (21112220312251).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1336885488 + ... + 1336901279.

It is an arithmetic number, because the mean of its divisors is an integer number (962563236480).

Almost surely, 2^{21112220312232} is an apocalyptic number.

It is an amenable number.

21112220312232 is an abundant number, since it is smaller than the sum of its proper divisors (40491826822488).

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

21112220312232 is a wasteful number, since it uses less digits than its factorization.

21112220312232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673786830 (or 2673786826 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21112220312232 its reverse (23221302221112), we get a palindrome (44333522533344).

The spelling of 21112220312232 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, three hundred twelve thousand, two hundred thirty-two".