23111001157 has 2 divisors, whose sum is σ = 23111001158. Its totient is φ = 23111001156.

The previous prime is 23111001083. The next prime is 23111001209. The reversal of 23111001157 is 75110011132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22716819841 + 394181316 = 150721^2 + 19854^2 .

It is a cyclic number.

It is not a de Polignac number, because 23111001157 - 2¹⁵ = 23110968389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23111001857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11555500578 + 11555500579.

It is an arithmetic number, because the mean of its divisors is an integer number (11555500579).

Almost surely, 2^23111001157 is an apocalyptic number.

It is an amenable number.

23111001157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23111001157 is an equidigital number, since it uses as much as digits as its factorization.

23111001157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 210, while the sum is 22.

Adding to 23111001157 its reverse (75110011132), we get a palindrome (98221012289).

The spelling of 23111001157 in words is "twenty-three billion, one hundred eleven million, one thousand, one hundred fifty-seven".