2102010210991 has 2 divisors, whose sum is σ = 2102010210992. Its totient is φ = 2102010210990.

The previous prime is 2102010210943. The next prime is 2102010211019. The reversal of 2102010210991 is 1990120102012.

It is an a-pointer prime, because the next prime (2102010211019) can be obtained adding 2102010210991 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2102010210991 - 2²¹ = 2102008113839 is a prime.

It is a super-2 number, since 2×2102010210991² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102010210491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051005105495 + 1051005105496.

It is an arithmetic number, because the mean of its divisors is an integer number (1051005105496).

Almost surely, 2^{2102010210991} is an apocalyptic number.

2102010210991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102010210991 is an equidigital number, since it uses as much as digits as its factorization.

2102010210991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 28.

The spelling of 2102010210991 in words is "two trillion, one hundred two billion, ten million, two hundred ten thousand, nine hundred ninety-one".