23221121312 has 12 divisors (see below), whose sum is σ = 45716582646. Its totient is φ = 11610560640.

The previous prime is 23221121269. The next prime is 23221121387. The reversal of 23221121312 is 21312112232.

It can be written as a sum of positive squares in only one way, i.e., 16764034576 + 6457086736 = 129476^2 + 80356^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362829989 + ... + 362830052.

Almost surely, 2^23221121312 is an apocalyptic number.

It is an amenable number.

23221121312 is a deficient number, since it is larger than the sum of its proper divisors (22495461334).

23221121312 is an equidigital number, since it uses as much as digits as its factorization.

23221121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725660051 (or 725660043 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

Adding to 23221121312 its reverse (21312112232), we get a palindrome (44533233544).

The spelling of 23221121312 in words is "twenty-three billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred twelve".