111331324121 has 2 divisors, whose sum is σ = 111331324122. Its totient is φ = 111331324120.

The previous prime is 111331324103. The next prime is 111331324151. The reversal of 111331324121 is 121423133111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107755284121 + 3576040000 = 328261^2 + 59800^2 .

It is a cyclic number.

It is not a de Polignac number, because 111331324121 - 2¹⁰ = 111331323097 is a prime.

It is not a weakly prime, because it can be changed into another prime (111331324151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55665662060 + 55665662061.

It is an arithmetic number, because the mean of its divisors is an integer number (55665662061).

Almost surely, 2^111331324121 is an apocalyptic number.

It is an amenable number.

111331324121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111331324121 is an equidigital number, since it uses as much as digits as its factorization.

111331324121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

Adding to 111331324121 its reverse (121423133111), we get a palindrome (232754457232).

The spelling of 111331324121 in words is "one hundred eleven billion, three hundred thirty-one million, three hundred twenty-four thousand, one hundred twenty-one".