12131881889 has 2 divisors, whose sum is σ = 12131881890. Its totient is φ = 12131881888.

The previous prime is 12131881871. The next prime is 12131881901. The reversal of 12131881889 is 98818813121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9373531489 + 2758350400 = 96817^2 + 52520^2 .

It is a cyclic number.

It is not a de Polignac number, because 12131881889 - 2⁸ = 12131881633 is a prime.

It is not a weakly prime, because it can be changed into another prime (12131884889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6065940944 + 6065940945.

It is an arithmetic number, because the mean of its divisors is an integer number (6065940945).

Almost surely, 2^12131881889 is an apocalyptic number.

It is an amenable number.

12131881889 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131881889 is an equidigital number, since it uses as much as digits as its factorization.

12131881889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 50.

The spelling of 12131881889 in words is "twelve billion, one hundred thirty-one million, eight hundred eighty-one thousand, eight hundred eighty-nine".