129221292144 has 40 divisors (see below), whose sum is σ = 381510482560. Its totient is φ = 36920369088.

The previous prime is 129221292133. The next prime is 129221292163. The reversal of 129221292144 is 441292122921.

It is a super-2 number, since 2×129221292144² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192293254 + ... + 192293925.

It is an arithmetic number, because the mean of its divisors is an integer number (9537762064).

Almost surely, 2^129221292144 is an apocalyptic number.

129221292144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129221292144 is an abundant number, since it is smaller than the sum of its proper divisors (252289190416).

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

129221292144 is a wasteful number, since it uses less digits than its factorization.

129221292144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384587197 (or 384587191 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The spelling of 129221292144 in words is "one hundred twenty-nine billion, two hundred twenty-one million, two hundred ninety-two thousand, one hundred forty-four".