111113121 has 16 divisors (see below), whose sum is σ = 178227200. Its totient is φ = 60151248.

The previous prime is 111113113. The next prime is 111113131. The reversal of 111113121 is 121311111.

It is not a de Polignac number, because 111113121 - 2³ = 111113113 is a prime.

It is a super-2 number, since 2×111113121² = 24692251316721282, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 111113097 and 111113106.

It is not an unprimeable number, because it can be changed into a prime (111113111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138841 + ... + 139638.

It is an arithmetic number, because the mean of its divisors is an integer number (11139200).

Almost surely, 2^111113121 is an apocalyptic number.

It is an amenable number.

111113121 is a deficient number, since it is larger than the sum of its proper divisors (67114079).

111113121 is a wasteful number, since it uses less digits than its factorization.

111113121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278508.

The product of its digits is 6, while the sum is 12.

The square root of 111113121 is about 10541.0208708645. The cubic root of 111113121 is about 480.7527555130.

Adding to 111113121 its reverse (121311111), we get a palindrome (232424232).

The spelling of 111113121 in words is "one hundred eleven million, one hundred thirteen thousand, one hundred twenty-one".