111231322111 has 16 divisors (see below), whose sum is σ = 136908233728. Its totient is φ = 88001964000.

The previous prime is 111231322091. The next prime is 111231322141. The reversal of 111231322111 is 111223132111.

It is a cyclic number.

It is not a de Polignac number, because 111231322111 - 2¹¹ = 111231320063 is a prime.

It is a super-2 number, since 2×111231322111² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111231322141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2376586 + ... + 2422936.

It is an arithmetic number, because the mean of its divisors is an integer number (8556764608).

Almost surely, 2^111231322111 is an apocalyptic number.

111231322111 is a deficient number, since it is larger than the sum of its proper divisors (25676911617).

111231322111 is a wasteful number, since it uses less digits than its factorization.

111231322111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72742.

The product of its digits is 72, while the sum is 19.

Adding to 111231322111 its reverse (111223132111), we get a palindrome (222454454222).

The spelling of 111231322111 in words is "one hundred eleven billion, two hundred thirty-one million, three hundred twenty-two thousand, one hundred eleven".