23015143121 has 2 divisors, whose sum is σ = 23015143122. Its totient is φ = 23015143120.

The previous prime is 23015143103. The next prime is 23015143127. The reversal of 23015143121 is 12134151032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19477272721 + 3537870400 = 139561^2 + 59480^2 .

It is a cyclic number.

It is not a de Polignac number, because 23015143121 - 2¹⁴ = 23015126737 is a prime.

It is a super-2 number, since 2×23015143121² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (23015143127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11507571560 + 11507571561.

It is an arithmetic number, because the mean of its divisors is an integer number (11507571561).

Almost surely, 2^23015143121 is an apocalyptic number.

It is an amenable number.

23015143121 is a deficient number, since it is larger than the sum of its proper divisors (1).

23015143121 is an equidigital number, since it uses as much as digits as its factorization.

23015143121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 23015143121 its reverse (12134151032), we get a palindrome (35149294153).

The spelling of 23015143121 in words is "twenty-three billion, fifteen million, one hundred forty-three thousand, one hundred twenty-one".