1111122112231 has 2 divisors, whose sum is σ = 1111122112232. Its totient is φ = 1111122112230.

The previous prime is 1111122112183. The next prime is 1111122112259. The reversal of 1111122112231 is 1322112211111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111122112231 - 2⁷ = 1111122112103 is a prime.

It is a super-2 number, since 2×1111122112231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1111122112199 and 1111122112208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111122112531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555561056115 + 555561056116.

It is an arithmetic number, because the mean of its divisors is an integer number (555561056116).

Almost surely, 2^{1111122112231} is an apocalyptic number.

1111122112231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111122112231 is an equidigital number, since it uses as much as digits as its factorization.

1111122112231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48, while the sum is 19.

Adding to 1111122112231 its reverse (1322112211111), we get a palindrome (2433234323342).

The spelling of 1111122112231 in words is "one trillion, one hundred eleven billion, one hundred twenty-two million, one hundred twelve thousand, two hundred thirty-one".