121331232 has 72 divisors (see below), whose sum is σ = 376412400. Its totient is φ = 36766080.

The previous prime is 121331213. The next prime is 121331239. The reversal of 121331232 is 232133121.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (121331239) 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, 15982 + ... + 22317.

It is an arithmetic number, because the mean of its divisors is an integer number (5227950).

Almost surely, 2^121331232 is an apocalyptic number.

121331232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121331232 is an abundant number, since it is smaller than the sum of its proper divisors (255081168).

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

121331232 is a wasteful number, since it uses less digits than its factorization.

121331232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38326 (or 38315 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 121331232 is about 11015.0457103001. The cubic root of 121331232 is about 495.0596561098.

Adding to 121331232 its reverse (232133121), we get a palindrome (353464353).

The spelling of 121331232 in words is "one hundred twenty-one million, three hundred thirty-one thousand, two hundred thirty-two".