113123213 has 6 divisors (see below), whose sum is σ = 131592366. Its totient is φ = 96962712.

The previous prime is 113123201. The next prime is 113123221. The reversal of 113123213 is 312321311.

It can be written as a sum of positive squares in only one way, i.e., 69272329 + 43850884 = 8323^2 + 6622^2 .

It is not a de Polignac number, because 113123213 - 2⁸ = 113122957 is a prime.

It is a super-2 number, since 2×113123213² = 25593722638886738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113123191 and 113123200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113123233) 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 5 ways as a sum of consecutive naturals, for example, 1154270 + ... + 1154367.

It is an arithmetic number, because the mean of its divisors is an integer number (21932061).

Almost surely, 2^113123213 is an apocalyptic number.

It is an amenable number.

113123213 is a deficient number, since it is larger than the sum of its proper divisors (18469153).

113123213 is an equidigital number, since it uses as much as digits as its factorization.

113123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2308651 (or 2308644 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 113123213 is about 10635.9396858012. The cubic root of 113123213 is about 483.6344669090.

Adding to 113123213 its reverse (312321311), we get a palindrome (425444524).

It can be divided in two parts, 11 and 3123213, that multiplied together give a palindrome (34355343).

The spelling of 113123213 in words is "one hundred thirteen million, one hundred twenty-three thousand, two hundred thirteen".