111331230121 has 2 divisors, whose sum is σ = 111331230122. Its totient is φ = 111331230120.

The previous prime is 111331230071. The next prime is 111331230139. The reversal of 111331230121 is 121032133111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89661918096 + 21669312025 = 299436^2 + 147205^2 .

It is a cyclic number.

It is not a de Polignac number, because 111331230121 - 2¹⁵ = 111331197353 is a prime.

It is not a weakly prime, because it can be changed into another prime (111331230161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55665615060 + 55665615061.

It is an arithmetic number, because the mean of its divisors is an integer number (55665615061).

Almost surely, 2^111331230121 is an apocalyptic number.

It is an amenable number.

111331230121 is a deficient number, since it is larger than the sum of its proper divisors (1).

111331230121 is an equidigital number, since it uses as much as digits as its factorization.

111331230121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 111331230121 its reverse (121032133111), we get a palindrome (232363363232).

The spelling of 111331230121 in words is "one hundred eleven billion, three hundred thirty-one million, two hundred thirty thousand, one hundred twenty-one".