121458867940 has 24 divisors (see below), whose sum is σ = 255070945080. Its totient is φ = 48582152448.

The previous prime is 121458867931. The next prime is 121458867973. The reversal of 121458867940 is 49768854121.

It can be written as a sum of positive squares in 4 ways, for example, as 11581203456 + 109877664484 = 107616^2 + 331478^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 899064 + ... + 1025296.

It is an arithmetic number, because the mean of its divisors is an integer number (10627956045).

Almost surely, 2^121458867940 is an apocalyptic number.

121458867940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121458867940 is an abundant number, since it is smaller than the sum of its proper divisors (133612077140).

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

121458867940 is a wasteful number, since it uses less digits than its factorization.

121458867940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174351 (or 174349 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 121458867940 in words is "one hundred twenty-one billion, four hundred fifty-eight million, eight hundred sixty-seven thousand, nine hundred forty".