20102110102091 has 2 divisors, whose sum is σ = 20102110102092. Its totient is φ = 20102110102090.

The previous prime is 20102110102069. The next prime is 20102110102111. The reversal of 20102110102091 is 19020101120102.

It is an a-pointer prime, because the next prime (20102110102111) can be obtained adding 20102110102091 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20102110102091 - 2⁶ = 20102110102027 is a prime.

It is a super-3 number, since 3×20102110102091³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (20102112102091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10051055051045 + 10051055051046.

It is an arithmetic number, because the mean of its divisors is an integer number (10051055051046).

Almost surely, 2^{20102110102091} is an apocalyptic number.

20102110102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

20102110102091 is an equidigital number, since it uses as much as digits as its factorization.

20102110102091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 20102110102091 its reverse (19020101120102), we get a palindrome (39122211222193).

The spelling of 20102110102091 in words is "twenty trillion, one hundred two billion, one hundred ten million, one hundred two thousand, ninety-one".