113311221 has 8 divisors (see below), whose sum is σ = 153558624. Its totient is φ = 74302320.

The previous prime is 113311213. The next prime is 113311223. The reversal of 113311221 is 122113311.

It is a happy number.

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

It is not a de Polignac number, because 113311221 - 2³ = 113311213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113311223) by changing a digit.

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, 309411 + ... + 309776.

It is an arithmetic number, because the mean of its divisors is an integer number (19194828).

Almost surely, 2^113311221 is an apocalyptic number.

It is an amenable number.

113311221 is a deficient number, since it is larger than the sum of its proper divisors (40247403).

113311221 is an equidigital number, since it uses as much as digits as its factorization.

113311221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619251.

The product of its digits is 36, while the sum is 15.

The square root of 113311221 is about 10644.7743517653. The cubic root of 113311221 is about 483.9022481480.

Adding to 113311221 its reverse (122113311), we get a palindrome (235424532).

The spelling of 113311221 in words is "one hundred thirteen million, three hundred eleven thousand, two hundred twenty-one".