11111122121110 has 64 divisors (see below), whose sum is σ = 22040767678464. Its totient is φ = 3999216208000.

The previous prime is 11111122121051. The next prime is 11111122121111. The reversal of 11111122121110 is 1112122111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11111122121111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37704999 + ... + 37998541.

It is an arithmetic number, because the mean of its divisors is an integer number (344386994976).

Almost surely, 2^{11111122121110} is an apocalyptic number.

11111122121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11111122121110 is a deficient number, since it is larger than the sum of its proper divisors (10929645557354).

11111122121110 is a wasteful number, since it uses less digits than its factorization.

11111122121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297069.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 11111122121110 its reverse (1112122111111), we get a palindrome (12223244232221).

Subtracting from 11111122121110 its reverse (1112122111111), we obtain a palindrome (9999000009999).

The spelling of 11111122121110 in words is "eleven trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twenty-one thousand, one hundred ten".