112213661 has 4 divisors (see below), whose sum is σ = 128244192. Its totient is φ = 96183132.

The previous prime is 112213657. The next prime is 112213681. The reversal of 112213661 is 166312211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166312211 = 13 ⋅12793247.

It is a cyclic number.

It is not a de Polignac number, because 112213661 - 2² = 112213657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112213681) 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, 8015255 + ... + 8015268.

It is an arithmetic number, because the mean of its divisors is an integer number (32061048).

Almost surely, 2^112213661 is an apocalyptic number.

It is an amenable number.

112213661 is a deficient number, since it is larger than the sum of its proper divisors (16030531).

112213661 is an equidigital number, since it uses as much as digits as its factorization.

112213661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16030530.

The product of its digits is 432, while the sum is 23.

The square root of 112213661 is about 10593.0949679496. The cubic root of 112213661 is about 482.3347780113.

Adding to 112213661 its reverse (166312211), we get a palindrome (278525872).

The spelling of 112213661 in words is "one hundred twelve million, two hundred thirteen thousand, six hundred sixty-one".