127892422021 has 24 divisors (see below), whose sum is σ = 160272059640. Its totient is φ = 101154759552.

The previous prime is 127892421991. The next prime is 127892422069. The reversal of 127892422021 is 120224298721.

It can be written as a sum of positive squares in 4 ways, for example, as 26606176996 + 101286245025 = 163114^2 + 318255^2 .

It is not a de Polignac number, because 127892422021 - 2⁵ = 127892421989 is a prime.

It is a super-2 number, since 2×127892422021² (a number of 23 digits) contains 22 as substring.

It is the 357621-st Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127892422081) by changing a digit.

It is a nontrivial repunit in base 357620.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1901515 + ... + 1967623.

It is an arithmetic number, because the mean of its divisors is an integer number (6678002485).

Almost surely, 2^127892422021 is an apocalyptic number.

It is an amenable number.

127892422021 is a deficient number, since it is larger than the sum of its proper divisors (32379637619).

127892422021 is a wasteful number, since it uses less digits than its factorization.

127892422021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69173 (or 69166 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 127892422021 in words is "one hundred twenty-seven billion, eight hundred ninety-two million, four hundred twenty-two thousand, twenty-one".