1311221133224 has 64 divisors (see below), whose sum is σ = 2570848035840. Its totient is φ = 625783403520.

The previous prime is 1311221133223. The next prime is 1311221133251. The reversal of 1311221133224 is 4223311221131.

It is a junction number, because it is equal to n+sod(n) for n = 1311221133193 and 1311221133202.

It is not an unprimeable number, because it can be changed into a prime (1311221133223) 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, 239664809 + ... + 239670279.

It is an arithmetic number, because the mean of its divisors is an integer number (40169500560).

Almost surely, 2^{1311221133224} is an apocalyptic number.

It is an amenable number.

1311221133224 is a deficient number, since it is larger than the sum of its proper divisors (1259626902616).

1311221133224 is a wasteful number, since it uses less digits than its factorization.

1311221133224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8010 (or 8006 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

Adding to 1311221133224 its reverse (4223311221131), we get a palindrome (5534532354355).

The spelling of 1311221133224 in words is "one trillion, three hundred eleven billion, two hundred twenty-one million, one hundred thirty-three thousand, two hundred twenty-four".