121311232 has 52 divisors (see below), whose sum is σ = 277314496. Its totient is φ = 51978240.

The previous prime is 121311227. The next prime is 121311247. The reversal of 121311232 is 232113121.

It is a Harshad number since it is a multiple of its sum of digits (16).

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, 26557 + ... + 30787.

Almost surely, 2^121311232 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 121311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138657248).

121311232 is an abundant number, since it is smaller than the sum of its proper divisors (156003264).

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

121311232 is an frugal number, since it uses more digits than its factorization.

121311232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4262 (or 4240 counting only the distinct ones).

The product of its digits is 72, while the sum is 16.

The square root of 121311232 is about 11014.1378237246. The cubic root of 121311232 is about 495.0324530639.

Adding to 121311232 its reverse (232113121), we get a palindrome (353424353).

The spelling of 121311232 in words is "one hundred twenty-one million, three hundred eleven thousand, two hundred thirty-two".