111222120231 has 6 divisors (see below), whose sum is σ = 160654173680. Its totient is φ = 74148080148.

The previous prime is 111222120161. The next prime is 111222120293. The reversal of 111222120231 is 132021222111.

It is not a de Polignac number, because 111222120231 - 2¹³ = 111222112039 is a prime.

It is a super-2 number, since 2×111222120231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111222120931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6179006671 + ... + 6179006688.

Almost surely, 2^111222120231 is an apocalyptic number.

111222120231 is a deficient number, since it is larger than the sum of its proper divisors (49432053449).

111222120231 is a wasteful number, since it uses less digits than its factorization.

111222120231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12358013365 (or 12358013362 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 111222120231 its reverse (132021222111), we get a palindrome (243243342342).

The spelling of 111222120231 in words is "one hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, two hundred thirty-one".