2102001313891 has 2 divisors, whose sum is σ = 2102001313892. Its totient is φ = 2102001313890.

The previous prime is 2102001313847. The next prime is 2102001313933. The reversal of 2102001313891 is 1983131002012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2102001313891 - 2¹¹ = 2102001311843 is a prime.

It is not a weakly prime, because it can be changed into another prime (2102001313831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051000656945 + 1051000656946.

It is an arithmetic number, because the mean of its divisors is an integer number (1051000656946).

Almost surely, 2^{2102001313891} is an apocalyptic number.

2102001313891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102001313891 is an equidigital number, since it uses as much as digits as its factorization.

2102001313891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 2102001313891 in words is "two trillion, one hundred two billion, one million, three hundred thirteen thousand, eight hundred ninety-one".