111451213 has 2 divisors, whose sum is σ = 111451214. Its totient is φ = 111451212.

The previous prime is 111451199. The next prime is 111451259. The reversal of 111451213 is 312154111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108430569 + 3020644 = 10413^2 + 1738^2 .

It is an emirp because it is prime and its reverse (312154111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111451213 - 2⁵ = 111451181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111451013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55725606 + 55725607.

It is an arithmetic number, because the mean of its divisors is an integer number (55725607).

Almost surely, 2^111451213 is an apocalyptic number.

It is an amenable number.

111451213 is a deficient number, since it is larger than the sum of its proper divisors (1).

111451213 is an equidigital number, since it uses as much as digits as its factorization.

111451213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120, while the sum is 19.

The square root of 111451213 is about 10557.0456568114. The cubic root of 111451213 is about 481.2398689496.

The spelling of 111451213 in words is "one hundred eleven million, four hundred fifty-one thousand, two hundred thirteen".