1222212011191 has 2 divisors, whose sum is σ = 1222212011192. Its totient is φ = 1222212011190.

The previous prime is 1222212011159. The next prime is 1222212011231. The reversal of 1222212011191 is 1911102122221.

It is a weak prime.

It is an emirp because it is prime and its reverse (1911102122221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222212011191 - 2⁵ = 1222212011159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222212011101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106005595 + 611106005596.

It is an arithmetic number, because the mean of its divisors is an integer number (611106005596).

Almost surely, 2^{1222212011191} is an apocalyptic number.

1222212011191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212011191 is an equidigital number, since it uses as much as digits as its factorization.

1222212011191 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 25.

The spelling of 1222212011191 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, eleven thousand, one hundred ninety-one".