113321221 has 8 divisors (see below), whose sum is σ = 122342360. Its totient is φ = 104343552.

The previous prime is 113321209. The next prime is 113321227. The reversal of 113321221 is 122123311.

It can be written as a sum of positive squares in 4 ways, for example, as 11088900 + 102232321 = 3330^2 + 10111^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 113321221 - 2⁵ = 113321189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113321195 and 113321204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113321227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5340 + ... + 15973.

It is an arithmetic number, because the mean of its divisors is an integer number (15292795).

Almost surely, 2^113321221 is an apocalyptic number.

It is an amenable number.

113321221 is a deficient number, since it is larger than the sum of its proper divisors (9021139).

113321221 is a wasteful number, since it uses less digits than its factorization.

113321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21735.

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

The square root of 113321221 is about 10645.2440554456. The cubic root of 113321221 is about 483.9164829257.

Adding to 113321221 its reverse (122123311), we get a palindrome (235444532).

The spelling of 113321221 in words is "one hundred thirteen million, three hundred twenty-one thousand, two hundred twenty-one".