11111099999999 has 4 divisors (see below), whose sum is σ = 11764694117664. Its totient is φ = 10457505882336.

The previous prime is 11111099999969. The next prime is 11111100000023. The reversal of 11111099999999 is 99999999011111.

It is a happy number.

11111099999999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111099999999 is a prime.

It is a Duffinian number.

11111099999999 is a modest number, since divided by 9999999 gives 1111109 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111099999959) 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, 326797058807 + ... + 326797058840.

It is an arithmetic number, because the mean of its divisors is an integer number (2941173529416).

Almost surely, 2^{11111099999999} is an apocalyptic number.

11111099999999 is a deficient number, since it is larger than the sum of its proper divisors (653594117665).

11111099999999 is an equidigital number, since it uses as much as digits as its factorization.

11111099999999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653594117664.

The product of its (nonzero) digits is 43046721, while the sum is 77.

It can be divided in two parts, 111110999999 and 99, that multiplied together give a palindrome (10999988999901).

The spelling of 11111099999999 in words is "eleven trillion, one hundred eleven billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-nine".