23111111012309 has 2 divisors, whose sum is σ = 23111111012310. Its totient is φ = 23111111012308.

The previous prime is 23111111012299. The next prime is 23111111012359. The reversal of 23111111012309 is 90321011111132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16206944866225 + 6904166146084 = 4025785^2 + 2627578^2 .

It is a cyclic number.

It is not a de Polignac number, because 23111111012309 - 2²⁴ = 23111094235093 is a prime.

It is a super-2 number, since 2×23111111012309² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23111111012359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11555555506154 + 11555555506155.

It is an arithmetic number, because the mean of its divisors is an integer number (11555555506155).

Almost surely, 2^{23111111012309} is an apocalyptic number.

It is an amenable number.

23111111012309 is a deficient number, since it is larger than the sum of its proper divisors (1).

23111111012309 is an equidigital number, since it uses as much as digits as its factorization.

23111111012309 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 26.

The spelling of 23111111012309 in words is "twenty-three trillion, one hundred eleven billion, one hundred eleven million, twelve thousand, three hundred nine".