210012100091 has 2 divisors, whose sum is σ = 210012100092. Its totient is φ = 210012100090.

The previous prime is 210012100073. The next prime is 210012100141. The reversal of 210012100091 is 190001210012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210012100091 - 2¹⁸ = 210011837947 is a prime.

It is not a weakly prime, because it can be changed into another prime (210012130091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105006050045 + 105006050046.

It is an arithmetic number, because the mean of its divisors is an integer number (105006050046).

Almost surely, 2^210012100091 is an apocalyptic number.

210012100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

210012100091 is an equidigital number, since it uses as much as digits as its factorization.

210012100091 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 17.

The spelling of 210012100091 in words is "two hundred ten billion, twelve million, one hundred thousand, ninety-one".