129812241189 has 4 divisors (see below), whose sum is σ = 173082988256. Its totient is φ = 86541494124.

The previous prime is 129812241131. The next prime is 129812241193. The reversal of 129812241189 is 981142218921.

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.

It is not a de Polignac number, because 129812241189 - 2²⁵ = 129778686757 is a prime.

It is a super-2 number, since 2×129812241189² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129812241089) 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, 21635373529 + ... + 21635373534.

It is an arithmetic number, because the mean of its divisors is an integer number (43270747064).

Almost surely, 2^129812241189 is an apocalyptic number.

It is an amenable number.

129812241189 is a deficient number, since it is larger than the sum of its proper divisors (43270747067).

129812241189 is an equidigital number, since it uses as much as digits as its factorization.

129812241189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43270747066.

The product of its digits is 165888, while the sum is 48.

The spelling of 129812241189 in words is "one hundred twenty-nine billion, eight hundred twelve million, two hundred forty-one thousand, one hundred eighty-nine".