210020010012091 has 2 divisors, whose sum is σ = 210020010012092. Its totient is φ = 210020010012090.

The previous prime is 210020010012037. The next prime is 210020010012133. The reversal of 210020010012091 is 190210010020012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 210020010012091 - 2⁹ = 210020010011579 is a prime.

It is not a weakly prime, because it can be changed into another prime (210020010012031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010005006045 + 105010005006046.

It is an arithmetic number, because the mean of its divisors is an integer number (105010005006046).

Almost surely, 2^{210020010012091} is an apocalyptic number.

210020010012091 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020010012091 is an equidigital number, since it uses as much as digits as its factorization.

210020010012091 is an evil number, because the sum of its binary digits is even.

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

The spelling of 210020010012091 in words is "two hundred ten trillion, twenty billion, ten million, twelve thousand, ninety-one".