23032313221 has 2 divisors, whose sum is σ = 23032313222. Its totient is φ = 23032313220.

The previous prime is 23032313207. The next prime is 23032313233. The reversal of 23032313221 is 12231323032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20303400100 + 2728913121 = 142490^2 + 52239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23032313221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23032313192 and 23032313201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23032313281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11516156610 + 11516156611.

It is an arithmetic number, because the mean of its divisors is an integer number (11516156611).

Almost surely, 2^23032313221 is an apocalyptic number.

It is an amenable number.

23032313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23032313221 is an equidigital number, since it uses as much as digits as its factorization.

23032313221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 23032313221 its reverse (12231323032), we get a palindrome (35263636253).

The spelling of 23032313221 in words is "twenty-three billion, thirty-two million, three hundred thirteen thousand, two hundred twenty-one".