129271226877 has 48 divisors (see below), whose sum is σ = 218971334400. Its totient is φ = 72765786240.

The previous prime is 129271226831. The next prime is 129271226893. The reversal of 129271226877 is 778622172921.

It is not a de Polignac number, because 129271226877 - 2¹⁸ = 129270964733 is a prime.

It is a super-2 number, since 2×129271226877² (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 (129271226807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 938149 + ... + 1067082.

It is an arithmetic number, because the mean of its divisors is an integer number (4561902800).

Almost surely, 2^129271226877 is an apocalyptic number.

It is an amenable number.

129271226877 is a deficient number, since it is larger than the sum of its proper divisors (89700107523).

129271226877 is a wasteful number, since it uses less digits than its factorization.

129271226877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2005298 (or 2005295 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The spelling of 129271226877 in words is "one hundred twenty-nine billion, two hundred seventy-one million, two hundred twenty-six thousand, eight hundred seventy-seven".