11117197999 has 2 divisors, whose sum is σ = 11117198000. Its totient is φ = 11117197998.

The previous prime is 11117197961. The next prime is 11117198003. The reversal of 11117197999 is 99979171111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11117197999 - 2¹⁷ = 11117066927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11117198999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5558598999 + 5558599000.

It is an arithmetic number, because the mean of its divisors is an integer number (5558599000).

Almost surely, 2^11117197999 is an apocalyptic number.

11117197999 is a deficient number, since it is larger than the sum of its proper divisors (1).

11117197999 is an equidigital number, since it uses as much as digits as its factorization.

11117197999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 321489, while the sum is 55.

The spelling of 11117197999 in words is "eleven billion, one hundred seventeen million, one hundred ninety-seven thousand, nine hundred ninety-nine".