111122222231 has 2 divisors, whose sum is σ = 111122222232. Its totient is φ = 111122222230.

The previous prime is 111122222221. The next prime is 111122222257. The reversal of 111122222231 is 132222221111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111122222231 is a prime.

It is a super-2 number, since 2×111122222231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111122222201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55561111115 + 55561111116.

It is an arithmetic number, because the mean of its divisors is an integer number (55561111116).

Almost surely, 2^111122222231 is an apocalyptic number.

111122222231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111122222231 is an equidigital number, since it uses as much as digits as its factorization.

111122222231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 20.

Adding to 111122222231 its reverse (132222221111), we get a palindrome (243344443342).

The spelling of 111122222231 in words is "one hundred eleven billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred thirty-one".