121957324458 has 16 divisors (see below), whose sum is σ = 247555166880. Its totient is φ = 40045688496.

The previous prime is 121957324381. The next prime is 121957324481. The reversal of 121957324458 is 854423759121.

It is a self number, because there is not a number n which added to its sum of digits gives 121957324458.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151687813 + ... + 151688616.

It is an arithmetic number, because the mean of its divisors is an integer number (15472197930).

Almost surely, 2^121957324458 is an apocalyptic number.

121957324458 is an abundant number, since it is smaller than the sum of its proper divisors (125597842422).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121957324458 is a wasteful number, since it uses less digits than its factorization.

121957324458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303376501.

The product of its digits is 2419200, while the sum is 51.

The spelling of 121957324458 in words is "one hundred twenty-one billion, nine hundred fifty-seven million, three hundred twenty-four thousand, four hundred fifty-eight".