111143131023431 has 16 divisors (see below), whose sum is σ = 124954965213120. Its totient is φ = 98087229799680.

The previous prime is 111143131023391. The next prime is 111143131023439. The reversal of 111143131023431 is 134320131341111.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 111143131023431 - 2⁶ = 111143131023367 is a prime.

It is a super-2 number, since 2×111143131023431² (a number of 29 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 = 111143131023394 and 111143131023403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111143131023439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86168846 + ... + 87449163.

It is an arithmetic number, because the mean of its divisors is an integer number (7809685325820).

Almost surely, 2^{111143131023431} is an apocalyptic number.

111143131023431 is a deficient number, since it is larger than the sum of its proper divisors (13811834189689).

111143131023431 is a wasteful number, since it uses less digits than its factorization.

111143131023431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173620186.

The product of its (nonzero) digits is 2592, while the sum is 29.

Adding to 111143131023431 its reverse (134320131341111), we get a palindrome (245463262364542).

The spelling of 111143131023431 in words is "one hundred eleven trillion, one hundred forty-three billion, one hundred thirty-one million, twenty-three thousand, four hundred thirty-one".