23121302232 has 64 divisors (see below), whose sum is σ = 66227454720. Its totient is φ = 6589427328.

The previous prime is 23121302231. The next prime is 23121302249. The reversal of 23121302232 is 23220312132.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 23121302199 and 23121302208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23121302231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106638 + ... + 240029.

It is an arithmetic number, because the mean of its divisors is an integer number (1034803980).

Almost surely, 2^23121302232 is an apocalyptic number.

It is an amenable number.

23121302232 is an abundant number, since it is smaller than the sum of its proper divisors (43106152488).

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

23121302232 is a wasteful number, since it uses less digits than its factorization.

23121302232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347080 (or 347076 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 23121302232 its reverse (23220312132), we get a palindrome (46341614364).

The spelling of 23121302232 in words is "twenty-three billion, one hundred twenty-one million, three hundred two thousand, two hundred thirty-two".