210211002091 has 2 divisors, whose sum is σ = 210211002092. Its totient is φ = 210211002090.

The previous prime is 210211002059. The next prime is 210211002143. The reversal of 210211002091 is 190200112012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210211002091 - 2⁵ = 210211002059 is a prime.

It is not a weakly prime, because it can be changed into another prime (210211072091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105105501045 + 105105501046.

It is an arithmetic number, because the mean of its divisors is an integer number (105105501046).

Almost surely, 2^210211002091 is an apocalyptic number.

210211002091 is a deficient number, since it is larger than the sum of its proper divisors (1).

210211002091 is an equidigital number, since it uses as much as digits as its factorization.

210211002091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 210211002091 in words is "two hundred ten billion, two hundred eleven million, two thousand, ninety-one".