121938544580 has 24 divisors (see below), whose sum is σ = 262991781528. Its totient is φ = 47457163008.

The previous prime is 121938544579. The next prime is 121938544589. The reversal of 121938544580 is 85445839121.

It can be written as a sum of positive squares in 4 ways, for example, as 17801963776 + 104136580804 = 133424^2 + 322702^2 .

It is not an unprimeable number, because it can be changed into a prime (121938544589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82390169 + ... + 82391648.

It is an arithmetic number, because the mean of its divisors is an integer number (10957990897).

Almost surely, 2^121938544580 is an apocalyptic number.

121938544580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121938544580 is an abundant number, since it is smaller than the sum of its proper divisors (141053236948).

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

121938544580 is a wasteful number, since it uses less digits than its factorization.

121938544580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164781863 (or 164781861 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 50.

The spelling of 121938544580 in words is "one hundred twenty-one billion, nine hundred thirty-eight million, five hundred forty-four thousand, five hundred eighty".