210000210091 has 16 divisors (see below), whose sum is σ = 250772235264. Its totient is φ = 171942259104.

The previous prime is 210000210029. The next prime is 210000210139. The reversal of 210000210091 is 190012000012.

It is not a de Polignac number, because 210000210091 - 2¹¹ = 210000208043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210000210001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 758136 + ... + 997381.

It is an arithmetic number, because the mean of its divisors is an integer number (15673264704).

Almost surely, 2^210000210091 is an apocalyptic number.

210000210091 is a deficient number, since it is larger than the sum of its proper divisors (40772025173).

210000210091 is a wasteful number, since it uses less digits than its factorization.

210000210091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756290.

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

The spelling of 210000210091 in words is "two hundred ten billion, two hundred ten thousand, ninety-one".