12891234923 has 12 divisors (see below), whose sum is σ = 15344671320. Its totient is φ = 10792660032.

The previous prime is 12891234877. The next prime is 12891235001. The reversal of 12891234923 is 32943219821.

It is not a de Polignac number, because 12891234923 - 2⁸ = 12891234667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12891234023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3057038 + ... + 3061251.

It is an arithmetic number, because the mean of its divisors is an integer number (1278722610).

Almost surely, 2^12891234923 is an apocalyptic number.

12891234923 is a deficient number, since it is larger than the sum of its proper divisors (2453436397).

12891234923 is an equidigital number, since it uses as much as digits as its factorization.

12891234923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6118346 (or 6118339 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The spelling of 12891234923 in words is "twelve billion, eight hundred ninety-one million, two hundred thirty-four thousand, nine hundred twenty-three".