113021 has 2 divisors, whose sum is σ = 113022. Its totient is φ = 113020.

The previous prime is 113017. The next prime is 113023. The reversal of 113021 is 120311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105625 + 7396 = 325^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 113021 - 2² = 113017 is a prime.

Together with 113023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56510 + 56511.

It is an arithmetic number, because the mean of its divisors is an integer number (56511).

2¹¹³⁰²¹ is an apocalyptic number.

It is an amenable number.

113021 is a deficient number, since it is larger than the sum of its proper divisors (1).

113021 is an equidigital number, since it uses as much as digits as its factorization.

113021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 8.

The square root of 113021 is about 336.1859604445. The cubic root of 113021 is about 48.3488759632.

Adding to 113021 its reverse (120311), we get a palindrome (233332).

The spelling of 113021 in words is "one hundred thirteen thousand, twenty-one".