11121099999 has 4 divisors (see below), whose sum is σ = 14828133336. Its totient is φ = 7414066664.

The previous prime is 11121099923. The next prime is 11121100009. The reversal of 11121099999 is 99999012111.

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 11121099999 - 2¹⁵ = 11121067231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121099299) 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, 1853516664 + ... + 1853516669.

It is an arithmetic number, because the mean of its divisors is an integer number (3707033334).

Almost surely, 2^11121099999 is an apocalyptic number.

11121099999 is a deficient number, since it is larger than the sum of its proper divisors (3707033337).

11121099999 is an equidigital number, since it uses as much as digits as its factorization.

11121099999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707033336.

The product of its (nonzero) digits is 118098, while the sum is 51.

The spelling of 11121099999 in words is "eleven billion, one hundred twenty-one million, ninety-nine thousand, nine hundred ninety-nine".