121101920 has 24 divisors (see below), whose sum is σ = 286103664. Its totient is φ = 48440704.

The previous prime is 121101899. The next prime is 121101989. The reversal of 121101920 is 29101121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 378284 + ... + 378603.

It is an arithmetic number, because the mean of its divisors is an integer number (11920986).

Almost surely, 2^121101920 is an apocalyptic number.

121101920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121101920 is an abundant number, since it is smaller than the sum of its proper divisors (165001744).

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

121101920 is an equidigital number, since it uses as much as digits as its factorization.

121101920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756902 (or 756894 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 121101920 is about 11004.6317521306. The cubic root of 121101920 is about 494.7475773166.

The spelling of 121101920 in words is "one hundred twenty-one million, one hundred one thousand, nine hundred twenty".