210099971 has 2 divisors, whose sum is σ = 210099972. Its totient is φ = 210099970.

The previous prime is 210099961. The next prime is 210099977. The reversal of 210099971 is 179990012.

210099971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210099971 - 2¹⁰ = 210098947 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (210099977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105049985 + 105049986.

It is an arithmetic number, because the mean of its divisors is an integer number (105049986).

Almost surely, 2^210099971 is an apocalyptic number.

210099971 is a deficient number, since it is larger than the sum of its proper divisors (1).

210099971 is an equidigital number, since it uses as much as digits as its factorization.

210099971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 210099971 is about 14494.8256629737. The cubic root of 210099971 is about 594.4865009197.

The spelling of 210099971 in words is "two hundred ten million, ninety-nine thousand, nine hundred seventy-one".