113312021 has 4 divisors (see below), whose sum is σ = 119977452. Its totient is φ = 106646592.

The previous prime is 113312011. The next prime is 113312027. The reversal of 113312021 is 120213311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120213311 = 863 ⋅139297.

It can be written as a sum of positive squares in 2 ways, for example, as 33477796 + 79834225 = 5786^2 + 8935^2 .

It is a cyclic number.

It is not a de Polignac number, because 113312021 - 2¹⁰ = 113310997 is a prime.

It is a super-2 number, since 2×113312021² = 25679228206208882, 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 = 113311987 and 113312005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113312027) 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, 3332690 + ... + 3332723.

It is an arithmetic number, because the mean of its divisors is an integer number (29994363).

Almost surely, 2^113312021 is an apocalyptic number.

It is an amenable number.

113312021 is a deficient number, since it is larger than the sum of its proper divisors (6665431).

113312021 is an equidigital number, since it uses as much as digits as its factorization.

113312021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6665430.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 113312021 is about 10644.8119288224. The cubic root of 113312021 is about 483.9033869610.

Adding to 113312021 its reverse (120213311), we get a palindrome (233525332).

The spelling of 113312021 in words is "one hundred thirteen million, three hundred twelve thousand, twenty-one".