113221320 has 32 divisors (see below), whose sum is σ = 339664320. Its totient is φ = 30192320.

The previous prime is 113221319. The next prime is 113221349. The reversal of 113221320 is 23122311.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 113221320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 471636 + ... + 471875.

It is an arithmetic number, because the mean of its divisors is an integer number (10614510).

Almost surely, 2^113221320 is an apocalyptic number.

113221320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

113221320 is an abundant number, since it is smaller than the sum of its proper divisors (226443000).

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

113221320 is a wasteful number, since it uses less digits than its factorization.

113221320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943525 (or 943521 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 113221320 is about 10640.5507376263. The cubic root of 113221320 is about 483.7742384479.

Adding to 113221320 its reverse (23122311), we get a palindrome (136343631).

Subtracting from 113221320 its reverse (23122311), we obtain a palindrome (90099009).

The spelling of 113221320 in words is "one hundred thirteen million, two hundred twenty-one thousand, three hundred twenty".