23201310991 has 2 divisors, whose sum is σ = 23201310992. Its totient is φ = 23201310990.

The previous prime is 23201310967. The next prime is 23201311009. The reversal of 23201310991 is 19901310232.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23201310991 - 2⁵ = 23201310959 is a prime.

It is a super-3 number, since 3×23201310991³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23201310931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11600655495 + 11600655496.

It is an arithmetic number, because the mean of its divisors is an integer number (11600655496).

Almost surely, 2^23201310991 is an apocalyptic number.

23201310991 is a deficient number, since it is larger than the sum of its proper divisors (1).

23201310991 is an equidigital number, since it uses as much as digits as its factorization.

23201310991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 23201310991 in words is "twenty-three billion, two hundred one million, three hundred ten thousand, nine hundred ninety-one".