10122517881 has 24 divisors (see below), whose sum is σ = 17589673920. Its totient is φ = 5479858656.

The previous prime is 10122517877. The next prime is 10122517883. The reversal of 10122517881 is 18871522101.

10122517881 is a `hidden beast` number, since 10 + 122 + 517 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 10122517881 - 2² = 10122517877 is a prime.

It is a super-2 number, since 2×10122517881² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10122517883) 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, 4227090 + ... + 4229483.

It is an arithmetic number, because the mean of its divisors is an integer number (732903080).

Almost surely, 2^10122517881 is an apocalyptic number.

It is an amenable number.

10122517881 is a deficient number, since it is larger than the sum of its proper divisors (7467156039).

10122517881 is a wasteful number, since it uses less digits than its factorization.

10122517881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8456605 (or 8456602 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 36.

The spelling of 10122517881 in words is "ten billion, one hundred twenty-two million, five hundred seventeen thousand, eight hundred eighty-one".