21312032110320 has 80 divisors (see below), whose sum is σ = 75505485196800. Its totient is φ = 4871321624832.

The previous prime is 21312032110309. The next prime is 21312032110357. The reversal of 21312032110320 is 2301123021312.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6342865020 + ... + 6342868379.

It is an arithmetic number, because the mean of its divisors is an integer number (943818564960).

Almost surely, 2^{21312032110320} is an apocalyptic number.

21312032110320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21312032110320 is an abundant number, since it is smaller than the sum of its proper divisors (54193453086480).

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

21312032110320 is a wasteful number, since it uses less digits than its factorization.

21312032110320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12685733422 (or 12685733416 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21312032110320 its reverse (2301123021312), we get a palindrome (23613155131632).

The spelling of 21312032110320 in words is "twenty-one trillion, three hundred twelve billion, thirty-two million, one hundred ten thousand, three hundred twenty".