23031021331 has 2 divisors, whose sum is σ = 23031021332. Its totient is φ = 23031021330.

The previous prime is 23031021317. The next prime is 23031021397. The reversal of 23031021331 is 13312013032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23031021331 - 2⁷ = 23031021203 is a prime.

It is a super-2 number, since 2×23031021331² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23031021299 and 23031021308.

It is not a weakly prime, because it can be changed into another prime (23031021131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515510665 + 11515510666.

It is an arithmetic number, because the mean of its divisors is an integer number (11515510666).

Almost surely, 2^23031021331 is an apocalyptic number.

23031021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031021331 is an equidigital number, since it uses as much as digits as its factorization.

23031021331 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 23031021331 its reverse (13312013032), we get a palindrome (36343034363).

The spelling of 23031021331 in words is "twenty-three billion, thirty-one million, twenty-one thousand, three hundred thirty-one".