111412121 has 2 divisors, whose sum is σ = 111412122. Its totient is φ = 111412120.

The previous prime is 111412087. The next prime is 111412157. The reversal of 111412121 is 121214111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111408025 + 4096 = 10555^2 + 64^2 .

It is a cyclic number.

It is not a de Polignac number, because 111412121 - 2⁶ = 111412057 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 111412096 and 111412105.

It is not a weakly prime, because it can be changed into another prime (111412421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55706060 + 55706061.

It is an arithmetic number, because the mean of its divisors is an integer number (55706061).

Almost surely, 2^111412121 is an apocalyptic number.

It is an amenable number.

111412121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111412121 is an equidigital number, since it uses as much as digits as its factorization.

111412121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16, while the sum is 14.

The square root of 111412121 is about 10555.1940294814. The cubic root of 111412121 is about 481.1835967075.

Adding to 111412121 its reverse (121214111), we get a palindrome (232626232).

The spelling of 111412121 in words is "one hundred eleven million, four hundred twelve thousand, one hundred twenty-one".