12111222211091 has 2 divisors, whose sum is σ = 12111222211092. Its totient is φ = 12111222211090.

The previous prime is 12111222211061. The next prime is 12111222211141. The reversal of 12111222211091 is 19011222211121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12111222211091 - 2⁴² = 7713175699987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12111222211091.

It is not a weakly prime, because it can be changed into another prime (12111222211061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055611105545 + 6055611105546.

It is an arithmetic number, because the mean of its divisors is an integer number (6055611105546).

Almost surely, 2^{12111222211091} is an apocalyptic number.

12111222211091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111222211091 is an equidigital number, since it uses as much as digits as its factorization.

12111222211091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 26.

The spelling of 12111222211091 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, two hundred eleven thousand, ninety-one".