113212113 has 16 divisors (see below), whose sum is σ = 172663680. Its totient is φ = 64636416.

The previous prime is 113212109. The next prime is 113212133. The reversal of 113212113 is 311212311.

It is a happy number.

It is not a de Polignac number, because 113212113 - 2² = 113212109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113212092 and 113212101.

It is not an unprimeable number, because it can be changed into a prime (113212103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41281 + ... + 43937.

It is an arithmetic number, because the mean of its divisors is an integer number (10791480).

Almost surely, 2^113212113 is an apocalyptic number.

It is an amenable number.

113212113 is a deficient number, since it is larger than the sum of its proper divisors (59451567).

113212113 is a wasteful number, since it uses less digits than its factorization.

113212113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696.

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

The square root of 113212113 is about 10640.1180914499. The cubic root of 113212113 is about 483.7611248101.

Adding to 113212113 its reverse (311212311), we get a palindrome (424424424).

It can be divided in two parts, 113 and 212113, that added together give a triangular number (212226 = T₆₅₁).

The spelling of 113212113 in words is "one hundred thirteen million, two hundred twelve thousand, one hundred thirteen".