113221128 has 16 divisors (see below), whose sum is σ = 283052880. Its totient is φ = 37740368.

The previous prime is 113221127. The next prime is 113221181. The reversal of 113221128 is 821122311.

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 (113221127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2358750 + ... + 2358797.

It is an arithmetic number, because the mean of its divisors is an integer number (17690805).

Almost surely, 2^113221128 is an apocalyptic number.

It is an amenable number.

113221128 is an abundant number, since it is smaller than the sum of its proper divisors (169831752).

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

113221128 is a wasteful number, since it uses less digits than its factorization.

113221128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4717556 (or 4717552 counting only the distinct ones).

The product of its digits is 192, while the sum is 21.

The square root of 113221128 is about 10640.5417155331. The cubic root of 113221128 is about 483.7739649873.

Adding to 113221128 its reverse (821122311), we get a palindrome (934343439).

The spelling of 113221128 in words is "one hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-eight".