11011111399 has 4 divisors (see below), whose sum is σ = 11034690264. Its totient is φ = 10987532536.

The previous prime is 11011111387. The next prime is 11011111451. The reversal of 11011111399 is 99311111011.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11011111399 - 2⁷ = 11011111271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011111999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11788732 + ... + 11789665.

It is an arithmetic number, because the mean of its divisors is an integer number (2758672566).

Almost surely, 2^11011111399 is an apocalyptic number.

11011111399 is a deficient number, since it is larger than the sum of its proper divisors (23578865).

11011111399 is an equidigital number, since it uses as much as digits as its factorization.

11011111399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23578864.

The product of its (nonzero) digits is 243, while the sum is 28.

The spelling of 11011111399 in words is "eleven billion, eleven million, one hundred eleven thousand, three hundred ninety-nine".