129122426804 has 24 divisors (see below), whose sum is σ = 267149850240. Its totient is φ = 53429969376.

The previous prime is 129122426779. The next prime is 129122426809. The reversal of 129122426804 is 408624221921.

It is a super-2 number, since 2×129122426804² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129122426809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79508072 + ... + 79509695.

It is an arithmetic number, because the mean of its divisors is an integer number (11131243760).

Almost surely, 2^129122426804 is an apocalyptic number.

129122426804 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129122426804 is an abundant number, since it is smaller than the sum of its proper divisors (138027423436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129122426804 is a wasteful number, since it uses less digits than its factorization.

129122426804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159017807 (or 159017805 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The spelling of 129122426804 in words is "one hundred twenty-nine billion, one hundred twenty-two million, four hundred twenty-six thousand, eight hundred four".