111121321243 has 2 divisors, whose sum is σ = 111121321244. Its totient is φ = 111121321242.

The previous prime is 111121321231. The next prime is 111121321273. The reversal of 111121321243 is 342123121111.

It is a weak prime.

It is an emirp because it is prime and its reverse (342123121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111121321243 - 2³³ = 102531386651 is a prime.

It is not a weakly prime, because it can be changed into another prime (111121321273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560660621 + 55560660622.

It is an arithmetic number, because the mean of its divisors is an integer number (55560660622).

Almost surely, 2^111121321243 is an apocalyptic number.

111121321243 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121321243 is an equidigital number, since it uses as much as digits as its factorization.

111121321243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 22.

Adding to 111121321243 its reverse (342123121111), we get a palindrome (453244442354).

The spelling of 111121321243 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred forty-three".