122788827291 has 32 divisors (see below), whose sum is σ = 177372762112. Its totient is φ = 75108228480.

The previous prime is 122788827277. The next prime is 122788827299. The reversal of 122788827291 is 192728887221.

It is not a de Polignac number, because 122788827291 - 2²² = 122784632987 is a prime.

It is a super-2 number, since 2×122788827291² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (122788827299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24442806 + ... + 24447828.

It is an arithmetic number, because the mean of its divisors is an integer number (5542898816).

Almost surely, 2^122788827291 is an apocalyptic number.

122788827291 is a deficient number, since it is larger than the sum of its proper divisors (54583934821).

122788827291 is a wasteful number, since it uses less digits than its factorization.

122788827291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8683.

The product of its digits is 3612672, while the sum is 57.

The spelling of 122788827291 in words is "one hundred twenty-two billion, seven hundred eighty-eight million, eight hundred twenty-seven thousand, two hundred ninety-one".