111342420423 has 80 divisors (see below), whose sum is σ = 187687610880. Its totient is φ = 65535886944.

The previous prime is 111342420421. The next prime is 111342420437. The reversal of 111342420423 is 324024243111.

111342420423 is a `hidden beast` number, since 1 + 1 + 13 + 424 + 204 + 23 = 666.

It is not a de Polignac number, because 111342420423 - 2¹ = 111342420421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111342420421) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5875758 + ... + 5894676.

It is an arithmetic number, because the mean of its divisors is an integer number (2346095136).

Almost surely, 2^111342420423 is an apocalyptic number.

111342420423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111342420423 is a deficient number, since it is larger than the sum of its proper divisors (76345190457).

111342420423 is an frugal number, since it uses more digits than its factorization.

111342420423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18982 (or 18958 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 111342420423 its reverse (324024243111), we get a palindrome (435366663534).

The spelling of 111342420423 in words is "one hundred eleven billion, three hundred forty-two million, four hundred twenty thousand, four hundred twenty-three".