12981507501923 has 2 divisors, whose sum is σ = 12981507501924. Its totient is φ = 12981507501922.

The previous prime is 12981507501901. The next prime is 12981507501929. The reversal of 12981507501923 is 32910570518921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12981507501923 - 2²⁴ = 12981490724707 is a prime.

It is not a weakly prime, because it can be changed into another prime (12981507501929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6490753750961 + 6490753750962.

It is an arithmetic number, because the mean of its divisors is an integer number (6490753750962).

Almost surely, 2^{12981507501923} is an apocalyptic number.

12981507501923 is a deficient number, since it is larger than the sum of its proper divisors (1).

12981507501923 is an equidigital number, since it uses as much as digits as its factorization.

12981507501923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1360800, while the sum is 53.

The spelling of 12981507501923 in words is "twelve trillion, nine hundred eighty-one billion, five hundred seven million, five hundred one thousand, nine hundred twenty-three".