111321121 has 2 divisors, whose sum is σ = 111321122. Its totient is φ = 111321120.

The previous prime is 111321107. The next prime is 111321137. The reversal of 111321121 is 121123111.

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., 65610000 + 45711121 = 8100^2 + 6761^2 .

It is a cyclic number.

It is not a de Polignac number, because 111321121 - 2¹¹ = 111319073 is a prime.

It is not a weakly prime, because it can be changed into another prime (111321421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55660560 + 55660561.

It is an arithmetic number, because the mean of its divisors is an integer number (55660561).

Almost surely, 2^111321121 is an apocalyptic number.

It is an amenable number.

111321121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111321121 is an equidigital number, since it uses as much as digits as its factorization.

111321121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 13.

The square root of 111321121 is about 10550.8824749402. The cubic root of 111321121 is about 481.0525528137.

Adding to 111321121 its reverse (121123111), we get a palindrome (232444232).

The spelling of 111321121 in words is "one hundred eleven million, three hundred twenty-one thousand, one hundred twenty-one".