129722091228 has 72 divisors (see below), whose sum is σ = 338565194240. Its totient is φ = 41836085280.

The previous prime is 129722091227. The next prime is 129722091271. The reversal of 129722091228 is 822190227921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129722091221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5956383 + ... + 5978121.

Almost surely, 2^129722091228 is an apocalyptic number.

129722091228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

129722091228 is an abundant number, since it is smaller than the sum of its proper divisors (208843103012).

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

129722091228 is a wasteful number, since it uses less digits than its factorization.

129722091228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27127 (or 27122 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 129722091228 in words is "one hundred twenty-nine billion, seven hundred twenty-two million, ninety-one thousand, two hundred twenty-eight".