111220204231 has 2 divisors, whose sum is σ = 111220204232. Its totient is φ = 111220204230.

The previous prime is 111220204163. The next prime is 111220204237. The reversal of 111220204231 is 132402022111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111220204231 - 2⁹ = 111220203719 is a prime.

It is a super-2 number, since 2×111220204231² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111220204199 and 111220204208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111220204237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610102115 + 55610102116.

It is an arithmetic number, because the mean of its divisors is an integer number (55610102116).

Almost surely, 2^111220204231 is an apocalyptic number.

111220204231 is a deficient number, since it is larger than the sum of its proper divisors (1).

111220204231 is an equidigital number, since it uses as much as digits as its factorization.

111220204231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 111220204231 its reverse (132402022111), we get a palindrome (243622226342).

The spelling of 111220204231 in words is "one hundred eleven billion, two hundred twenty million, two hundred four thousand, two hundred thirty-one".