23121202320 has 120 divisors (see below), whose sum is σ = 79747409976. Its totient is φ = 5999007744.

The previous prime is 23121202319. The next prime is 23121202337. The reversal of 23121202320 is 2320212132.

23121202320 is a `hidden beast` number, since 2 + 312 + 120 + 232 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4665436416 + 18455765904 = 68304^2 + 135852^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23121202293 and 23121202302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407317 + ... + 460596.

Almost surely, 2^23121202320 is an apocalyptic number.

23121202320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23121202320 is an abundant number, since it is smaller than the sum of its proper divisors (56626207656).

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

23121202320 is a wasteful number, since it uses less digits than its factorization.

23121202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867969 (or 867960 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 23121202320 its reverse (2320212132), we get a palindrome (25441414452).

The spelling of 23121202320 in words is "twenty-three billion, one hundred twenty-one million, two hundred two thousand, three hundred twenty".