113021021 has 2 divisors, whose sum is σ = 113021022. Its totient is φ = 113021020.

The previous prime is 113020991. The next prime is 113021053. The reversal of 113021021 is 120120311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80371225 + 32649796 = 8965^2 + 5714^2 .

It is a cyclic number.

It is not a de Polignac number, because 113021021 - 2¹⁰ = 113019997 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 113020993 and 113021011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113021081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56510510 + 56510511.

It is an arithmetic number, because the mean of its divisors is an integer number (56510511).

Almost surely, 2^113021021 is an apocalyptic number.

It is an amenable number.

113021021 is a deficient number, since it is larger than the sum of its proper divisors (1).

113021021 is an equidigital number, since it uses as much as digits as its factorization.

113021021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 113021021 is about 10631.1345114245. The cubic root of 113021021 is about 483.4887895772.

Adding to 113021021 its reverse (120120311), we get a palindrome (233141332).

The spelling of 113021021 in words is "one hundred thirteen million, twenty-one thousand, twenty-one".