111511331441 has 8 divisors (see below), whose sum is σ = 111843551400. Its totient is φ = 111179184768.

The previous prime is 111511331423. The next prime is 111511331447. The reversal of 111511331441 is 144133115111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2542680625 + 108968650816 = 50425^2 + 330104^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111511331441 - 2²⁶ = 111444222577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111511331441.

It is not an unprimeable number, because it can be changed into a prime (111511331447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5230295 + ... + 5251571.

It is an arithmetic number, because the mean of its divisors is an integer number (13980443925).

Almost surely, 2^111511331441 is an apocalyptic number.

It is an amenable number.

111511331441 is a deficient number, since it is larger than the sum of its proper divisors (332219959).

111511331441 is a wasteful number, since it uses less digits than its factorization.

111511331441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36643.

The product of its digits is 720, while the sum is 26.

Adding to 111511331441 its reverse (144133115111), we get a palindrome (255644446552).

The spelling of 111511331441 in words is "one hundred eleven billion, five hundred eleven million, three hundred thirty-one thousand, four hundred forty-one".