11111100997 has 2 divisors, whose sum is σ = 11111100998. Its totient is φ = 11111100996.

The previous prime is 11111100989. The next prime is 11111101019. The reversal of 11111100997 is 79900111111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7115091201 + 3996009796 = 84351^2 + 63214^2 .

It is an emirp because it is prime and its reverse (79900111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111100997 - 2³ = 11111100989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111100947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555550498 + 5555550499.

It is an arithmetic number, because the mean of its divisors is an integer number (5555550499).

Almost surely, 2^11111100997 is an apocalyptic number.

It is an amenable number.

11111100997 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111100997 is an equidigital number, since it uses as much as digits as its factorization.

11111100997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 567, while the sum is 31.

The spelling of 11111100997 in words is "eleven billion, one hundred eleven million, one hundred thousand, nine hundred ninety-seven".