111122231121 has 48 divisors (see below), whose sum is σ = 178188092160. Its totient is φ = 66165089760.

The previous prime is 111122231113. The next prime is 111122231123. The reversal of 111122231121 is 121132221111.

It is a happy number.

111122231121 is a `hidden beast` number, since 1 + 111 + 222 + 311 + 21 = 666.

It is not a de Polignac number, because 111122231121 - 2³ = 111122231113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111122231094 and 111122231103.

It is not an unprimeable number, because it can be changed into a prime (111122231123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2491806 + ... + 2536008.

It is an arithmetic number, because the mean of its divisors is an integer number (3712251920).

Almost surely, 2^111122231121 is an apocalyptic number.

111122231121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111122231121 is a deficient number, since it is larger than the sum of its proper divisors (67065861039).

111122231121 is a wasteful number, since it uses less digits than its factorization.

111122231121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44666 (or 44663 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 111122231121 its reverse (121132221111), we get a palindrome (232254452232).

It can be divided in two parts, 111122 and 231121, that added together give a palindrome (342243).

The spelling of 111122231121 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred thirty-one thousand, one hundred twenty-one".