12989038981 has 4 divisors (see below), whose sum is σ = 13171983264. Its totient is φ = 12806094700.

The previous prime is 12989038969. The next prime is 12989038987. The reversal of 12989038981 is 18983098921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18983098921 = 23 ⋅825352127.

It is a cyclic number.

It is not a de Polignac number, because 12989038981 - 2⁵ = 12989038949 is a prime.

It is a super-2 number, since 2×12989038981² (a number of 21 digits) contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12989038987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91472035 + ... + 91472176.

It is an arithmetic number, because the mean of its divisors is an integer number (3292995816).

Almost surely, 2^12989038981 is an apocalyptic number.

It is an amenable number.

12989038981 is a deficient number, since it is larger than the sum of its proper divisors (182944283).

12989038981 is an equidigital number, since it uses as much as digits as its factorization.

12989038981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182944282.

The product of its (nonzero) digits is 2239488, while the sum is 58.

The spelling of 12989038981 in words is "twelve billion, nine hundred eighty-nine million, thirty-eight thousand, nine hundred eighty-one".