111313121 has 2 divisors, whose sum is σ = 111313122. Its totient is φ = 111313120.

The previous prime is 111313099. The next prime is 111313183. The reversal of 111313121 is 121313111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107412496 + 3900625 = 10364^2 + 1975^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111313121 is a prime.

It is a super-2 number, since 2×111313121² = 24781221813521282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111313096 and 111313105.

It is not a weakly prime, because it can be changed into another prime (111313421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55656560 + 55656561.

It is an arithmetic number, because the mean of its divisors is an integer number (55656561).

Almost surely, 2^111313121 is an apocalyptic number.

It is an amenable number.

111313121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111313121 is an equidigital number, since it uses as much as digits as its factorization.

111313121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18, while the sum is 14.

The square root of 111313121 is about 10550.5033529211. The cubic root of 111313121 is about 481.0410290568.

Adding to 111313121 its reverse (121313111), we get a palindrome (232626232).

The spelling of 111313121 in words is "one hundred eleven million, three hundred thirteen thousand, one hundred twenty-one".