113122213 has 4 divisors (see below), whose sum is σ = 113153740. Its totient is φ = 113090688.

The previous prime is 113122171. The next prime is 113122253. The reversal of 113122213 is 312221311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312221311 = 193 ⋅1617727.

It can be written as a sum of positive squares in 2 ways, for example, as 71944324 + 41177889 = 8482^2 + 6417^2 .

It is a cyclic number.

It is not a de Polignac number, because 113122213 - 2¹⁷ = 112991141 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 (113122253) 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, 9570 + ... + 17827.

It is an arithmetic number, because the mean of its divisors is an integer number (28288435).

Almost surely, 2^113122213 is an apocalyptic number.

It is an amenable number.

113122213 is a deficient number, since it is larger than the sum of its proper divisors (31527).

113122213 is an equidigital number, since it uses as much as digits as its factorization.

113122213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31526.

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

The square root of 113122213 is about 10635.8926752765. The cubic root of 113122213 is about 483.6330418083.

Adding to 113122213 its reverse (312221311), we get a palindrome (425343524).

It can be divided in two parts, 11 and 3122213, that multiplied together give a palindrome (34344343).

The spelling of 113122213 in words is "one hundred thirteen million, one hundred twenty-two thousand, two hundred thirteen".