12129431379 has 16 divisors (see below), whose sum is σ = 17418610944. Its totient is φ = 7463412000.

The previous prime is 12129431359. The next prime is 12129431399. The reversal of 12129431379 is 97313492121.

It is an interprime number because it is at equal distance from previous prime (12129431359) and next prime (12129431399).

It is not a de Polignac number, because 12129431379 - 2²⁹ = 11592560467 is a prime.

It is a super-4 number, since 4×12129431379⁴ (a number of 41 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12129431379.

It is not an unprimeable number, because it can be changed into a prime (12129431309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594904 + ... + 614954.

It is an arithmetic number, because the mean of its divisors is an integer number (1088663184).

Almost surely, 2^12129431379 is an apocalyptic number.

12129431379 is a deficient number, since it is larger than the sum of its proper divisors (5289179565).

12129431379 is a wasteful number, since it uses less digits than its factorization.

12129431379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35578.

The product of its digits is 81648, while the sum is 42.

The spelling of 12129431379 in words is "twelve billion, one hundred twenty-nine million, four hundred thirty-one thousand, three hundred seventy-nine".