21312211100032 has 32 divisors (see below), whose sum is σ = 42459147846720. Its totient is φ = 10655797522944.

The previous prime is 21312211100021. The next prime is 21312211100087. The reversal of 21312211100032 is 23000111221312.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 21312211099982 and 21312211100009.

It is a congruent number.

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, 2071378 + ... + 6849454.

It is an arithmetic number, because the mean of its divisors is an integer number (1326848370210).

Almost surely, 2^{21312211100032} is an apocalyptic number.

It is an amenable number.

21312211100032 is a deficient number, since it is larger than the sum of its proper divisors (21146936746688).

21312211100032 is an equidigital number, since it uses as much as digits as its factorization.

21312211100032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812938 (or 4812926 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 21312211100032 its reverse (23000111221312), we get a palindrome (44312322321344).

The spelling of 21312211100032 in words is "twenty-one trillion, three hundred twelve billion, two hundred eleven million, one hundred thousand, thirty-two".