102010210091 has 2 divisors, whose sum is σ = 102010210092. Its totient is φ = 102010210090.

The previous prime is 102010210039. The next prime is 102010210097. The reversal of 102010210091 is 190012010201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102010210091 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (102010210097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51005105045 + 51005105046.

It is an arithmetic number, because the mean of its divisors is an integer number (51005105046).

Almost surely, 2^102010210091 is an apocalyptic number.

102010210091 is a deficient number, since it is larger than the sum of its proper divisors (1).

102010210091 is an equidigital number, since it uses as much as digits as its factorization.

102010210091 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.

Adding to 102010210091 its reverse (190012010201), we get a palindrome (292022220292).

The spelling of 102010210091 in words is "one hundred two billion, ten million, two hundred ten thousand, ninety-one".