23320313221 has 2 divisors, whose sum is σ = 23320313222. Its totient is φ = 23320313220.

The previous prime is 23320313183. The next prime is 23320313251. The reversal of 23320313221 is 12231302332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21502996321 + 1817316900 = 146639^2 + 42630^2 .

It is a cyclic number.

It is not a de Polignac number, because 23320313221 - 2²⁹ = 22783442309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23320313192 and 23320313201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23320313251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11660156610 + 11660156611.

It is an arithmetic number, because the mean of its divisors is an integer number (11660156611).

Almost surely, 2^23320313221 is an apocalyptic number.

It is an amenable number.

23320313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23320313221 is an equidigital number, since it uses as much as digits as its factorization.

23320313221 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 23320313221 its reverse (12231302332), we get a palindrome (35551615553).

The spelling of 23320313221 in words is "twenty-three billion, three hundred twenty million, three hundred thirteen thousand, two hundred twenty-one".