113245021 has 2 divisors, whose sum is σ = 113245022. Its totient is φ = 113245020.

The previous prime is 113245019. The next prime is 113245039. The reversal of 113245021 is 120542311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63824121 + 49420900 = 7989^2 + 7030^2 .

It is a cyclic number.

It is not a de Polignac number, because 113245021 - 2¹ = 113245019 is a prime.

Together with 113245019, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 113245021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113245001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56622510 + 56622511.

It is an arithmetic number, because the mean of its divisors is an integer number (56622511).

Almost surely, 2^113245021 is an apocalyptic number.

It is an amenable number.

113245021 is a deficient number, since it is larger than the sum of its proper divisors (1).

113245021 is an equidigital number, since it uses as much as digits as its factorization.

113245021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 113245021 is about 10641.6643904983. The cubic root of 113245021 is about 483.8079927893.

Adding to 113245021 its reverse (120542311), we get a palindrome (233787332).

The spelling of 113245021 in words is "one hundred thirteen million, two hundred forty-five thousand, twenty-one".