121155232 has 48 divisors (see below), whose sum is σ = 261110304. Its totient is φ = 54880000.

The previous prime is 121155227. The next prime is 121155239. The reversal of 121155232 is 232551121.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (121155239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172482 + ... + 173182.

It is an arithmetic number, because the mean of its divisors is an integer number (5439798).

Almost surely, 2^121155232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121155232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130555152).

121155232 is an abundant number, since it is smaller than the sum of its proper divisors (139955072).

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

121155232 is a wasteful number, since it uses less digits than its factorization.

121155232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1205 counting only the distinct ones).

The product of its digits is 600, while the sum is 22.

The square root of 121155232 is about 11007.0537383988. The cubic root of 121155232 is about 494.8201666236.

The spelling of 121155232 in words is "one hundred twenty-one million, one hundred fifty-five thousand, two hundred thirty-two".