121158380 has 36 divisors (see below), whose sum is σ = 295975008. Its totient is φ = 41539680.

The previous prime is 121158379. The next prime is 121158397. The reversal of 121158380 is 83851121.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60836 + ... + 62795.

It is an arithmetic number, because the mean of its divisors is an integer number (8221528).

Almost surely, 2^121158380 is an apocalyptic number.

121158380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121158380 is an abundant number, since it is smaller than the sum of its proper divisors (174816628).

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

121158380 is a wasteful number, since it uses less digits than its factorization.

121158380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123654 (or 123645 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 121158380 is about 11007.1967366810. The cubic root of 121158380 is about 494.8244522561.

The spelling of 121158380 in words is "one hundred twenty-one million, one hundred fifty-eight thousand, three hundred eighty".