21312022113 has 12 divisors (see below), whose sum is σ = 31439011968. Its totient is φ = 13905716280.

The previous prime is 21312022099. The next prime is 21312022117. The reversal of 21312022113 is 31122021312.

It is not a de Polignac number, because 21312022113 - 2¹⁸ = 21311759969 is a prime.

21312022113 is a modest number, since divided by 22113 gives 21312 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21312022117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25191093 + ... + 25191938.

It is an arithmetic number, because the mean of its divisors is an integer number (2619917664).

Almost surely, 2^21312022113 is an apocalyptic number.

It is an amenable number.

21312022113 is a deficient number, since it is larger than the sum of its proper divisors (10126989855).

21312022113 is a wasteful number, since it uses less digits than its factorization.

21312022113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50383084 (or 50383081 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21312022113 its reverse (31122021312), we get a palindrome (52434043425).

The spelling of 21312022113 in words is "twenty-one billion, three hundred twelve million, twenty-two thousand, one hundred thirteen".