23311212131 has 2 divisors, whose sum is σ = 23311212132. Its totient is φ = 23311212130.

The previous prime is 23311212019. The next prime is 23311212151. The reversal of 23311212131 is 13121211332.

It is a happy number.

It is an a-pointer prime, because the next prime (23311212151) can be obtained adding 23311212131 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23311212131 - 2³⁴ = 6131342947 is a prime.

It is a super-2 number, since 2×23311212131² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (23311212151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11655606065 + 11655606066.

It is an arithmetic number, because the mean of its divisors is an integer number (11655606066).

Almost surely, 2^23311212131 is an apocalyptic number.

23311212131 is a deficient number, since it is larger than the sum of its proper divisors (1).

23311212131 is an equidigital number, since it uses as much as digits as its factorization.

23311212131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 20.

Adding to 23311212131 its reverse (13121211332), we get a palindrome (36432423463).

The spelling of 23311212131 in words is "twenty-three billion, three hundred eleven million, two hundred twelve thousand, one hundred thirty-one".