113220311 has 4 divisors (see below), whose sum is σ = 115981824. Its totient is φ = 110458800.

The previous prime is 113220307. The next prime is 113220313. The reversal of 113220311 is 113022311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113220311 - 2² = 113220307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113220313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380695 + ... + 1380776.

It is an arithmetic number, because the mean of its divisors is an integer number (28995456).

Almost surely, 2^113220311 is an apocalyptic number.

113220311 is a deficient number, since it is larger than the sum of its proper divisors (2761513).

113220311 is an equidigital number, since it uses as much as digits as its factorization.

113220311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761512.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 113220311 is about 10640.5033245613. The cubic root of 113220311 is about 483.7728013521.

Adding to 113220311 its reverse (113022311), we get a palindrome (226242622).

The spelling of 113220311 in words is "one hundred thirteen million, two hundred twenty thousand, three hundred eleven".