113113721 has 8 divisors (see below), whose sum is σ = 131094144. Its totient is φ = 95588640.

The previous prime is 113113709. The next prime is 113113723. The reversal of 113113721 is 127311311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 113113721 - 2¹⁸ = 112851577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113113693 and 113113702.

It is not an unprimeable number, because it can be changed into a prime (113113723) 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 7 ways as a sum of consecutive naturals, for example, 113300 + ... + 114293.

It is an arithmetic number, because the mean of its divisors is an integer number (16386768).

Almost surely, 2^113113721 is an apocalyptic number.

It is an amenable number.

113113721 is a deficient number, since it is larger than the sum of its proper divisors (17980423).

113113721 is an equidigital number, since it uses as much as digits as its factorization.

113113721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227671.

The product of its digits is 126, while the sum is 20.

The square root of 113113721 is about 10635.4934535263. The cubic root of 113113721 is about 483.6209395151.

The spelling of 113113721 in words is "one hundred thirteen million, one hundred thirteen thousand, seven hundred twenty-one".