118292021 has 2 divisors, whose sum is σ = 118292022. Its totient is φ = 118292020.

The previous prime is 118291981. The next prime is 118292023. The reversal of 118292021 is 120292811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88096996 + 30195025 = 9386^2 + 5495^2 .

It is a cyclic number.

It is not a de Polignac number, because 118292021 - 2²⁶ = 51183157 is a prime.

It is a Sophie Germain prime.

Together with 118292023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (118292023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59146010 + 59146011.

It is an arithmetic number, because the mean of its divisors is an integer number (59146011).

Almost surely, 2^118292021 is an apocalyptic number.

It is an amenable number.

118292021 is a deficient number, since it is larger than the sum of its proper divisors (1).

118292021 is an equidigital number, since it uses as much as digits as its factorization.

118292021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 118292021 is about 10876.2135414858. The cubic root of 118292021 is about 490.8910912790.

The spelling of 118292021 in words is "one hundred eighteen million, two hundred ninety-two thousand, twenty-one".