23121131251 has 2 divisors, whose sum is σ = 23121131252. Its totient is φ = 23121131250.

The previous prime is 23121131207. The next prime is 23121131321. The reversal of 23121131251 is 15213112132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23121131251 - 2⁷ = 23121131123 is a prime.

It is not a weakly prime, because it can be changed into another prime (23121131051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11560565625 + 11560565626.

It is an arithmetic number, because the mean of its divisors is an integer number (11560565626).

Almost surely, 2^23121131251 is an apocalyptic number.

23121131251 is a deficient number, since it is larger than the sum of its proper divisors (1).

23121131251 is an equidigital number, since it uses as much as digits as its factorization.

23121131251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

Adding to 23121131251 its reverse (15213112132), we get a palindrome (38334243383).

The spelling of 23121131251 in words is "twenty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred fifty-one".