111431142442 has 12 divisors (see below), whose sum is σ = 172712476098. Its totient is φ = 53918293800.

The previous prime is 111431142419. The next prime is 111431142443. The reversal of 111431142442 is 244241134111.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 86347234801 + 25083907641 = 293849^2 + 158379^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111431142442.

It is not an unprimeable number, because it can be changed into a prime (111431142443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28986409 + ... + 28990252.

Almost surely, 2^111431142442 is an apocalyptic number.

111431142442 is a deficient number, since it is larger than the sum of its proper divisors (61281333656).

111431142442 is an equidigital number, since it uses as much as digits as its factorization.

111431142442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57976725 (or 57976694 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

Adding to 111431142442 its reverse (244241134111), we get a palindrome (355672276553).

The spelling of 111431142442 in words is "one hundred eleven billion, four hundred thirty-one million, one hundred forty-two thousand, four hundred forty-two".