111121323121110 has 64 divisors (see below), whose sum is σ = 277518606140160. Its totient is φ = 28452665136000.

The previous prime is 111121323121057. The next prime is 111121323121117. The reversal of 111121323121110 is 11121323121111.

It is a super-2 number, since 2×111121323121110² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111121323121117) 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, 729928641 + ... + 730080860.

It is an arithmetic number, because the mean of its divisors is an integer number (4336228220940).

Almost surely, 2^{111121323121110} is an apocalyptic number.

111121323121110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111121323121110 is an abundant number, since it is smaller than the sum of its proper divisors (166397283019050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111121323121110 is a wasteful number, since it uses less digits than its factorization.

111121323121110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460009613.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 111121323121110 its reverse (11121323121111), we get a palindrome (122242646242221).

Subtracting from 111121323121110 its reverse (11121323121111), we obtain a palindrome (99999999999999).

The spelling of 111121323121110 in words is "one hundred eleven trillion, one hundred twenty-one billion, three hundred twenty-three million, one hundred twenty-one thousand, one hundred ten".