121840872054 has 32 divisors (see below), whose sum is σ = 273019355136. Its totient is φ = 35923597920.

The previous prime is 121840872007. The next prime is 121840872061. The reversal of 121840872054 is 450278048121.

It is a junction number, because it is equal to n+sod(n) for n = 121840871997 and 121840872015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24944502 + ... + 24949385.

It is an arithmetic number, because the mean of its divisors is an integer number (8531854848).

Almost surely, 2^121840872054 is an apocalyptic number.

121840872054 is an abundant number, since it is smaller than the sum of its proper divisors (151178483082).

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

121840872054 is a wasteful number, since it uses less digits than its factorization.

121840872054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49893940.

The product of its (nonzero) digits is 143360, while the sum is 42.

The spelling of 121840872054 in words is "one hundred twenty-one billion, eight hundred forty million, eight hundred seventy-two thousand, fifty-four".