122981217458 has 18 divisors (see below), whose sum is σ = 202775547807. Its totient is φ = 55898073660.

The previous prime is 122981217413. The next prime is 122981217523. The reversal of 122981217458 is 854712189221.

It can be written as a sum of positive squares in only one way, i.e., 61490608729 + 61490608729 = 247973^2 + 247973^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=247973.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5444135 + ... + 5466677.

Almost surely, 2^122981217458 is an apocalyptic number.

122981217458 is a deficient number, since it is larger than the sum of its proper divisors (79794330349).

122981217458 is an frugal number, since it uses more digits than its factorization.

122981217458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45110 (or 22556 counting only the distinct ones).

The product of its digits is 645120, while the sum is 50.

Multiplying 122981217458 by its sum of digits (50), we get a square (6149060872900 = 2479730²).

The spelling of 122981217458 in words is "one hundred twenty-two billion, nine hundred eighty-one million, two hundred seventeen thousand, four hundred fifty-eight".