121199179400 has 48 divisors (see below), whose sum is σ = 303464105700. Its totient is φ = 44750465280.

The previous prime is 121199179379. The next prime is 121199179447. The reversal of 121199179400 is 4971991121.

It can be written as a sum of positive squares in 6 ways, for example, as 747147556 + 120452031844 = 27334^2 + 347062^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23304935 + ... + 23310134.

Almost surely, 2^121199179400 is an apocalyptic number.

121199179400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121199179400 is an abundant number, since it is smaller than the sum of its proper divisors (182264926300).

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

121199179400 is a wasteful number, since it uses less digits than its factorization.

121199179400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46615098 (or 46615089 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 44.

The spelling of 121199179400 in words is "one hundred twenty-one billion, one hundred ninety-nine million, one hundred seventy-nine thousand, four hundred".