113021971 has 2 divisors, whose sum is σ = 113021972. Its totient is φ = 113021970.

The previous prime is 113021947. The next prime is 113021983. The reversal of 113021971 is 179120311.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 113021971 - 2⁹ = 113021459 is a prime.

It is not a weakly prime, because it can be changed into another prime (113021911) 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, 56510985 + 56510986.

It is an arithmetic number, because the mean of its divisors is an integer number (56510986).

Almost surely, 2^113021971 is an apocalyptic number.

113021971 is a deficient number, since it is larger than the sum of its proper divisors (1).

113021971 is an equidigital number, since it uses as much as digits as its factorization.

113021971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 113021971 is about 10631.1791914162. The cubic root of 113021971 is about 483.4901442310.

The spelling of 113021971 in words is "one hundred thirteen million, twenty-one thousand, nine hundred seventy-one".