210200100091 has 2 divisors, whose sum is σ = 210200100092. Its totient is φ = 210200100090.

The previous prime is 210200100037. The next prime is 210200100133. The reversal of 210200100091 is 190001002012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210200100091 - 2²¹ = 210198002939 is a prime.

It is not a weakly prime, because it can be changed into another prime (210200100001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105100050045 + 105100050046.

It is an arithmetic number, because the mean of its divisors is an integer number (105100050046).

Almost surely, 2^210200100091 is an apocalyptic number.

210200100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

210200100091 is an equidigital number, since it uses as much as digits as its factorization.

210200100091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 210200100091 in words is "two hundred ten billion, two hundred million, one hundred thousand, ninety-one".