121089888 has 72 divisors (see below), whose sum is σ = 362489400. Its totient is φ = 38237184.

The previous prime is 121089887. The next prime is 121089901. The reversal of 121089888 is 888980121.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121089883) 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, 5593 + ... + 16536.

It is an arithmetic number, because the mean of its divisors is an integer number (5034575).

Almost surely, 2^121089888 is an apocalyptic number.

121089888 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

121089888 is an abundant number, since it is smaller than the sum of its proper divisors (241399512).

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

121089888 is a wasteful number, since it uses less digits than its factorization.

121089888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22164 (or 22153 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The square root of 121089888 is about 11004.0850596494. The cubic root of 121089888 is about 494.7311916694.

The spelling of 121089888 in words is "one hundred twenty-one million, eighty-nine thousand, eight hundred eighty-eight".