11122210991 has 2 divisors, whose sum is σ = 11122210992. Its totient is φ = 11122210990.

The previous prime is 11122210943. The next prime is 11122211011. The reversal of 11122210991 is 19901222111.

It is a strong prime.

It is an emirp because it is prime and its reverse (19901222111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11122210991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122210691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561105495 + 5561105496.

It is an arithmetic number, because the mean of its divisors is an integer number (5561105496).

Almost surely, 2^11122210991 is an apocalyptic number.

11122210991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122210991 is an equidigital number, since it uses as much as digits as its factorization.

11122210991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 29.

The spelling of 11122210991 in words is "eleven billion, one hundred twenty-two million, two hundred ten thousand, nine hundred ninety-one".