2111200102091 has 2 divisors, whose sum is σ = 2111200102092. Its totient is φ = 2111200102090.

The previous prime is 2111200102031. The next prime is 2111200102111. The reversal of 2111200102091 is 1902010021112.

It is an a-pointer prime, because the next prime (2111200102111) can be obtained adding 2111200102091 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2111200102091 - 2⁶ = 2111200102027 is a prime.

It is not a weakly prime, because it can be changed into another prime (2111200102021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055600051045 + 1055600051046.

It is an arithmetic number, because the mean of its divisors is an integer number (1055600051046).

Almost surely, 2^{2111200102091} is an apocalyptic number.

2111200102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111200102091 is an equidigital number, since it uses as much as digits as its factorization.

2111200102091 is an evil number, because the sum of its binary digits is even.

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

The spelling of 2111200102091 in words is "two trillion, one hundred eleven billion, two hundred million, one hundred two thousand, ninety-one".