111423311121 has 16 divisors (see below), whose sum is σ = 149082715584. Its totient is φ = 74023317504.

The previous prime is 111423311107. The next prime is 111423311141. The reversal of 111423311121 is 121113324111.

It is a happy number.

It is not a de Polignac number, because 111423311121 - 2¹⁴ = 111423294737 is a prime.

It is a super-2 number, since 2×111423311121² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111423311141) 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, 1735041 + ... + 1798113.

It is an arithmetic number, because the mean of its divisors is an integer number (9317669724).

Almost surely, 2^111423311121 is an apocalyptic number.

It is an amenable number.

111423311121 is a deficient number, since it is larger than the sum of its proper divisors (37659404463).

111423311121 is a wasteful number, since it uses less digits than its factorization.

111423311121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65120.

The product of its digits is 144, while the sum is 21.

Adding to 111423311121 its reverse (121113324111), we get a palindrome (232536635232).

The spelling of 111423311121 in words is "one hundred eleven billion, four hundred twenty-three million, three hundred eleven thousand, one hundred twenty-one".