111341343121 has 2 divisors, whose sum is σ = 111341343122. Its totient is φ = 111341343120.

The previous prime is 111341343067. The next prime is 111341343137. The reversal of 111341343121 is 121343143111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69751451025 + 41589892096 = 264105^2 + 203936^2 .

It is an emirp because it is prime and its reverse (121343143111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111341343121 - 2²⁹ = 110804472209 is a prime.

It is not a weakly prime, because it can be changed into another prime (111341349121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55670671560 + 55670671561.

It is an arithmetic number, because the mean of its divisors is an integer number (55670671561).

Almost surely, 2^111341343121 is an apocalyptic number.

It is an amenable number.

111341343121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111341343121 is an equidigital number, since it uses as much as digits as its factorization.

111341343121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 25.

Adding to 111341343121 its reverse (121343143111), we get a palindrome (232684486232).

The spelling of 111341343121 in words is "one hundred eleven billion, three hundred forty-one million, three hundred forty-three thousand, one hundred twenty-one".