2002111102091 has 2 divisors, whose sum is σ = 2002111102092. Its totient is φ = 2002111102090.

The previous prime is 2002111102087. The next prime is 2002111102171. The reversal of 2002111102091 is 1902011112002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2002111102091 - 2² = 2002111102087 is a prime.

It is not a weakly prime, because it can be changed into another prime (2002111102891) 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, 1001055551045 + 1001055551046.

It is an arithmetic number, because the mean of its divisors is an integer number (1001055551046).

Almost surely, 2^{2002111102091} is an apocalyptic number.

2002111102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2002111102091 is an equidigital number, since it uses as much as digits as its factorization.

2002111102091 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 2002111102091 its reverse (1902011112002), we get a palindrome (3904122214093).

The spelling of 2002111102091 in words is "two trillion, two billion, one hundred eleven million, one hundred two thousand, ninety-one".