111144312241321 has 2 divisors, whose sum is σ = 111144312241322. Its totient is φ = 111144312241320.

The previous prime is 111144312241297. The next prime is 111144312241327. The reversal of 111144312241321 is 123142213441111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88929351015696 + 22214961225625 = 9430236^2 + 4713275^2 .

It is a cyclic number.

It is not a de Polignac number, because 111144312241321 - 2⁹ = 111144312240809 is a prime.

It is not a weakly prime, because it can be changed into another prime (111144312241327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55572156120660 + 55572156120661.

It is an arithmetic number, because the mean of its divisors is an integer number (55572156120661).

Almost surely, 2^{111144312241321} is an apocalyptic number.

It is an amenable number.

111144312241321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111144312241321 is an equidigital number, since it uses as much as digits as its factorization.

111144312241321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 31.

Adding to 111144312241321 its reverse (123142213441111), we get a palindrome (234286525682432).

The spelling of 111144312241321 in words is "one hundred eleven trillion, one hundred forty-four billion, three hundred twelve million, two hundred forty-one thousand, three hundred twenty-one".