1224111111331 has 4 divisors (see below), whose sum is σ = 1224162091152. Its totient is φ = 1224060131512.

The previous prime is 1224111111277. The next prime is 1224111111523. The reversal of 1224111111331 is 1331111114221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1224111111331 - 2¹¹ = 1224111109283 is a prime.

It is a super-2 number, since 2×1224111111331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224111111131) 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 3 ways as a sum of consecutive naturals, for example, 25453876 + ... + 25501921.

It is an arithmetic number, because the mean of its divisors is an integer number (306040522788).

Almost surely, 2^{1224111111331} is an apocalyptic number.

1224111111331 is a deficient number, since it is larger than the sum of its proper divisors (50979821).

1224111111331 is an equidigital number, since it uses as much as digits as its factorization.

1224111111331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50979820.

The product of its digits is 144, while the sum is 22.

Adding to 1224111111331 its reverse (1331111114221), we get a palindrome (2555222225552).

The spelling of 1224111111331 in words is "one trillion, two hundred twenty-four billion, one hundred eleven million, one hundred eleven thousand, three hundred thirty-one".