113023021 has 4 divisors (see below), whose sum is σ = 119671452. Its totient is φ = 106374592.

The previous prime is 113023007. The next prime is 113023051. The reversal of 113023021 is 120320311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120320311 = 197 ⋅610763.

It can be written as a sum of positive squares in 2 ways, for example, as 93122500 + 19900521 = 9650^2 + 4461^2 .

It is a cyclic number.

It is not a de Polignac number, because 113023021 - 2⁹ = 113022509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 113022992 and 113023010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113023051) 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, 3324190 + ... + 3324223.

It is an arithmetic number, because the mean of its divisors is an integer number (29917863).

Almost surely, 2^113023021 is an apocalyptic number.

It is an amenable number.

113023021 is a deficient number, since it is larger than the sum of its proper divisors (6648431).

113023021 is an equidigital number, since it uses as much as digits as its factorization.

113023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648430.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 113023021 is about 10631.2285743464. The cubic root of 113023021 is about 483.4916414711.

Adding to 113023021 its reverse (120320311), we get a palindrome (233343332).

The spelling of 113023021 in words is "one hundred thirteen million, twenty-three thousand, twenty-one".