111423321 has 24 divisors (see below), whose sum is σ = 170996904. Its totient is φ = 69672960.

The previous prime is 111423251. The next prime is 111423343. The reversal of 111423321 is 123324111.

It can be written as a sum of positive squares in 4 ways, for example, as 24206400 + 87216921 = 4920^2 + 9339^2 .

It is not a de Polignac number, because 111423321 - 2¹⁷ = 111292249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111423294 and 111423303.

It is not an unprimeable number, because it can be changed into a prime (111423421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 50481 + ... + 52641.

It is an arithmetic number, because the mean of its divisors is an integer number (7124871).

Almost surely, 2^111423321 is an apocalyptic number.

It is an amenable number.

111423321 is a deficient number, since it is larger than the sum of its proper divisors (59573583).

111423321 is a wasteful number, since it uses less digits than its factorization.

111423321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2521 (or 2518 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 111423321 is about 10555.7245606353. The cubic root of 111423321 is about 481.1997202545.

Adding to 111423321 its reverse (123324111), we get a palindrome (234747432).

The spelling of 111423321 in words is "one hundred eleven million, four hundred twenty-three thousand, three hundred twenty-one".