21311200112232 has 16 divisors (see below), whose sum is σ = 53278000280640. Its totient is φ = 7103733370736.

The previous prime is 21311200112227. The next prime is 21311200112243. The reversal of 21311200112232 is 23221100211312.

It is a junction number, because it is equal to n+sod(n) for n = 21311200112199 and 21311200112208.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443983335648 + ... + 443983335695.

It is an arithmetic number, because the mean of its divisors is an integer number (3329875017540).

Almost surely, 2^{21311200112232} is an apocalyptic number.

It is an amenable number.

21311200112232 is an abundant number, since it is smaller than the sum of its proper divisors (31966800168408).

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

21311200112232 is a wasteful number, since it uses less digits than its factorization.

21311200112232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887966671352 (or 887966671348 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21311200112232 its reverse (23221100211312), we get a palindrome (44532300323544).

The spelling of 21311200112232 in words is "twenty-one trillion, three hundred eleven billion, two hundred million, one hundred twelve thousand, two hundred thirty-two".