121450054550 has 24 divisors (see below), whose sum is σ = 246433202712. Its totient is φ = 44163656000.

The previous prime is 121450054549. The next prime is 121450054553. The reversal of 121450054550 is 55450054121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121450054553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110408591 + ... + 110409690.

It is an arithmetic number, because the mean of its divisors is an integer number (10268050113).

Almost surely, 2^121450054550 is an apocalyptic number.

121450054550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121450054550 is an abundant number, since it is smaller than the sum of its proper divisors (124983148162).

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

121450054550 is a wasteful number, since it uses less digits than its factorization.

121450054550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220818304 (or 220818299 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 121450054550 in words is "one hundred twenty-one billion, four hundred fifty million, fifty-four thousand, five hundred fifty".