23130031321 has 2 divisors, whose sum is σ = 23130031322. Its totient is φ = 23130031320.

The previous prime is 23130031313. The next prime is 23130031339. The reversal of 23130031321 is 12313003132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22782581721 + 347449600 = 150939^2 + 18640^2 .

It is a cyclic number.

It is not a de Polignac number, because 23130031321 - 2³ = 23130031313 is a prime.

It is not a weakly prime, because it can be changed into another prime (23130031361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565015660 + 11565015661.

It is an arithmetic number, because the mean of its divisors is an integer number (11565015661).

Almost surely, 2^23130031321 is an apocalyptic number.

It is an amenable number.

23130031321 is a deficient number, since it is larger than the sum of its proper divisors (1).

23130031321 is an equidigital number, since it uses as much as digits as its factorization.

23130031321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 23130031321 its reverse (12313003132), we get a palindrome (35443034453).

The spelling of 23130031321 in words is "twenty-three billion, one hundred thirty million, thirty-one thousand, three hundred twenty-one".