2102303001991 has 2 divisors, whose sum is σ = 2102303001992. Its totient is φ = 2102303001990.

The previous prime is 2102303001983. The next prime is 2102303002013. The reversal of 2102303001991 is 1991003032012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102303001991 - 2³ = 2102303001983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102303001901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051151500995 + 1051151500996.

It is an arithmetic number, because the mean of its divisors is an integer number (1051151500996).

Almost surely, 2^{2102303001991} is an apocalyptic number.

2102303001991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102303001991 is an equidigital number, since it uses as much as digits as its factorization.

2102303001991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The spelling of 2102303001991 in words is "two trillion, one hundred two billion, three hundred three million, one thousand, nine hundred ninety-one".