11111111099990 has 32 divisors (see below), whose sum is σ = 22034203420320. Its totient is φ = 4000400032000.

The previous prime is 11111111099989. The next prime is 11111111100071. The reversal of 11111111099990 is 9999011111111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 500038895 + ... + 500061114.

It is an arithmetic number, because the mean of its divisors is an integer number (688568856885).

Almost surely, 2^{11111111099990} is an apocalyptic number.

11111111099990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111111099990 is a deficient number, since it is larger than the sum of its proper divisors (10923092320330).

11111111099990 is a wasteful number, since it uses less digits than its factorization.

11111111099990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000100128.

The product of its (nonzero) digits is 6561, while the sum is 44.

The spelling of 11111111099990 in words is "eleven trillion, one hundred eleven billion, one hundred eleven million, ninety-nine thousand, nine hundred ninety".