111215204441 has 12 divisors (see below), whose sum is σ = 122686165476. Its totient is φ = 100739701920.

The previous prime is 111215204413. The next prime is 111215204461. The reversal of 111215204441 is 144402512111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10154794441 + 101060410000 = 100771^2 + 317900^2 .

It is not a de Polignac number, because 111215204441 - 2⁶ = 111215204377 is a prime.

It is a super-2 number, since 2×111215204441² (a number of 23 digits) contains 22 as substring.

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 111215204441.

It is not an unprimeable number, because it can be changed into a prime (111215204461) 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 11 ways as a sum of consecutive naturals, for example, 1625570 + ... + 1692603.

It is an arithmetic number, because the mean of its divisors is an integer number (10223847123).

Almost surely, 2^111215204441 is an apocalyptic number.

111215204441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111215204441 is a deficient number, since it is larger than the sum of its proper divisors (11470961035).

111215204441 is a wasteful number, since it uses less digits than its factorization.

111215204441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318472 (or 3318461 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

Adding to 111215204441 its reverse (144402512111), we get a palindrome (255617716552).

The spelling of 111215204441 in words is "one hundred eleven billion, two hundred fifteen million, two hundred four thousand, four hundred forty-one".