121158912 has 144 divisors (see below), whose sum is σ = 380936192. Its totient is φ = 33454080.

The previous prime is 121158853. The next prime is 121158913. The reversal of 121158912 is 219851121.

It is a self number, because there is not a number n which added to its sum of digits gives 121158912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121158913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166293 + ... + 167019.

Almost surely, 2^121158912 is an apocalyptic number.

121158912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121158912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190468096).

121158912 is an abundant number, since it is smaller than the sum of its proper divisors (259777280).

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

121158912 is an equidigital number, since it uses as much as digits as its factorization.

121158912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 784 (or 770 counting only the distinct ones).

The product of its digits is 1440, while the sum is 30.

The square root of 121158912 is about 11007.2209026620. The cubic root of 121158912 is about 494.8251765043.

The spelling of 121158912 in words is "one hundred twenty-one million, one hundred fifty-eight thousand, nine hundred twelve".