121999244740 has 12 divisors (see below), whose sum is σ = 256198413996. Its totient is φ = 48799697888.

The previous prime is 121999244707. The next prime is 121999244743. The reversal of 121999244740 is 47442999121.

It can be written as a sum of positive squares in 2 ways, for example, as 38594959936 + 83404284804 = 196456^2 + 288798^2 .

It is not an unprimeable number, because it can be changed into a prime (121999244743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3049981099 + ... + 3049981138.

It is an arithmetic number, because the mean of its divisors is an integer number (21349867833).

Almost surely, 2^121999244740 is an apocalyptic number.

121999244740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121999244740 is an abundant number, since it is smaller than the sum of its proper divisors (134199169256).

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

121999244740 is a wasteful number, since it uses less digits than its factorization.

121999244740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6099962246 (or 6099962244 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 52.

The spelling of 121999244740 in words is "one hundred twenty-one billion, nine hundred ninety-nine million, two hundred forty-four thousand, seven hundred forty".