113942021 has 2 divisors, whose sum is σ = 113942022. Its totient is φ = 113942020.

The previous prime is 113941979. The next prime is 113942047. The reversal of 113942021 is 120249311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111724900 + 2217121 = 10570^2 + 1489^2 .

It is a cyclic number.

It is not a de Polignac number, because 113942021 - 2¹⁸ = 113679877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113942051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56971010 + 56971011.

It is an arithmetic number, because the mean of its divisors is an integer number (56971011).

Almost surely, 2^113942021 is an apocalyptic number.

It is an amenable number.

113942021 is a deficient number, since it is larger than the sum of its proper divisors (1).

113942021 is an equidigital number, since it uses as much as digits as its factorization.

113942021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 113942021 is about 10674.3627912864. The cubic root of 113942021 is about 484.7985431781.

The spelling of 113942021 in words is "one hundred thirteen million, nine hundred forty-two thousand, twenty-one".