81122122122118 has 32 divisors (see below), whose sum is σ = 151716342290688. Its totient is φ = 31604471901600.

The previous prime is 81122122122079. The next prime is 81122122122143.

81122122122118 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9760705 + ... + 16047292.

It is an arithmetic number, because the mean of its divisors is an integer number (4741135696584).

Almost surely, 2^{81122122122118} is an apocalyptic number.

81122122122118 is a deficient number, since it is larger than the sum of its proper divisors (70594220168570).

81122122122118 is a wasteful number, since it uses less digits than its factorization.

81122122122118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25828428.

The product of its digits is 4096, while the sum is 34.

The spelling of 81122122122118 in words is "eighty-one trillion, one hundred twenty-two billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred eighteen".