111331506143 has 16 divisors (see below), whose sum is σ = 131081336736. Its totient is φ = 93220554240.

The previous prime is 111331506131. The next prime is 111331506161. The reversal of 111331506143 is 341605133111.

It is a happy number.

It is not a de Polignac number, because 111331506143 - 2¹⁸ = 111331243999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111331506173) 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, 786446 + ... + 917147.

It is an arithmetic number, because the mean of its divisors is an integer number (8192583546).

Almost surely, 2^111331506143 is an apocalyptic number.

111331506143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

111331506143 is a deficient number, since it is larger than the sum of its proper divisors (19749830593).

111331506143 is a wasteful number, since it uses less digits than its factorization.

111331506143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704074.

The product of its (nonzero) digits is 3240, while the sum is 29.

Adding to 111331506143 its reverse (341605133111), we get a palindrome (452936639254).

The spelling of 111331506143 in words is "one hundred eleven billion, three hundred thirty-one million, five hundred six thousand, one hundred forty-three".