21320244202312 has 16 divisors (see below), whose sum is σ = 43609590414000. Its totient is φ = 9691020091920.

The previous prime is 21320244202297. The next prime is 21320244202319.

21320244202312 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21320244202312² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21320244202319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121137751062 + ... + 121137751237.

It is an arithmetic number, because the mean of its divisors is an integer number (2725599400875).

Almost surely, 2^{21320244202312} is an apocalyptic number.

21320244202312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21320244202312 is an abundant number, since it is smaller than the sum of its proper divisors (22289346211688).

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

21320244202312 is a wasteful number, since it uses less digits than its factorization.

21320244202312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242275502316 (or 242275502312 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

It can be divided in two parts, 2132024 and 4202312, that added together give a palindrome (6334336).

The spelling of 21320244202312 in words is "twenty-one trillion, three hundred twenty billion, two hundred forty-four million, two hundred two thousand, three hundred twelve".