11111122112122 has 16 divisors (see below), whose sum is σ = 17951874161760. Its totient is φ = 5140763962992.

The previous prime is 11111122112087. The next prime is 11111122112159. The reversal of 11111122112122 is 22121122111111.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 11111122112122.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3399974533 + ... + 3399977800.

It is an arithmetic number, because the mean of its divisors is an integer number (1121992135110).

Almost surely, 2^{11111122112122} is an apocalyptic number.

11111122112122 is a deficient number, since it is larger than the sum of its proper divisors (6840752049638).

11111122112122 is a wasteful number, since it uses less digits than its factorization.

11111122112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6799952397.

The product of its digits is 32, while the sum is 19.

Adding to 11111122112122 its reverse (22121122111111), we get a palindrome (33232244223233).

The spelling of 11111122112122 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twelve thousand, one hundred twenty-two".