1313221233321 has 6 divisors (see below), whose sum is σ = 1896875114810. Its totient is φ = 875480822208.

The previous prime is 1313221233271. The next prime is 1313221233353. The reversal of 1313221233321 is 1233321223131.

1313221233321 is a `hidden beast` number, since 1 + 3 + 1 + 322 + 1 + 2 + 3 + 332 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1137166304400 + 176054928921 = 1066380^2 + 419589^2 .

It is not a de Polignac number, because 1313221233321 - 2²⁷ = 1313087015593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1313221233391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72956735176 + ... + 72956735193.

Almost surely, 2^{1313221233321} is an apocalyptic number.

It is an amenable number.

1313221233321 is a deficient number, since it is larger than the sum of its proper divisors (583653881489).

1313221233321 is a wasteful number, since it uses less digits than its factorization.

1313221233321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145913470375 (or 145913470372 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1313221233321 its reverse (1233321223131), we get a palindrome (2546542456452).

The spelling of 1313221233321 in words is "one trillion, three hundred thirteen billion, two hundred twenty-one million, two hundred thirty-three thousand, three hundred twenty-one".