12220100011891 has 2 divisors, whose sum is σ = 12220100011892. Its totient is φ = 12220100011890.

The previous prime is 12220100011831. The next prime is 12220100011897. The reversal of 12220100011891 is 19811000102221.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12220100011891 is a prime.

It is not a weakly prime, because it can be changed into another prime (12220100011897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6110050005945 + 6110050005946.

It is an arithmetic number, because the mean of its divisors is an integer number (6110050005946).

Almost surely, 2^{12220100011891} is an apocalyptic number.

12220100011891 is a deficient number, since it is larger than the sum of its proper divisors (1).

12220100011891 is an equidigital number, since it uses as much as digits as its factorization.

12220100011891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 28.

The spelling of 12220100011891 in words is "twelve trillion, two hundred twenty billion, one hundred million, eleven thousand, eight hundred ninety-one".