111444143231 has 4 divisors (see below), whose sum is σ = 111445078032. Its totient is φ = 111443208432.

The previous prime is 111444143131. The next prime is 111444143257. The reversal of 111444143231 is 132341444111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 132341444111 = 3881 ⋅34099831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111444143231 is a prime.

It is a super-2 number, since 2×111444143231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111444143194 and 111444143203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111444143131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 257006 + ... + 537531.

It is an arithmetic number, because the mean of its divisors is an integer number (27861269508).

Almost surely, 2^111444143231 is an apocalyptic number.

111444143231 is a deficient number, since it is larger than the sum of its proper divisors (934801).

111444143231 is an equidigital number, since it uses as much as digits as its factorization.

111444143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934800.

The product of its digits is 4608, while the sum is 29.

Adding to 111444143231 its reverse (132341444111), we get a palindrome (243785587342).

The spelling of 111444143231 in words is "one hundred eleven billion, four hundred forty-four million, one hundred forty-three thousand, two hundred thirty-one".