1313331302221 has 4 divisors (see below), whose sum is σ = 1314405163872. Its totient is φ = 1312257440572.

The previous prime is 1313331302219. The next prime is 1313331302291. The reversal of 1313331302221 is 1222031333131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1313331302221 - 2¹ = 1313331302219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313331302201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 536928991 + ... + 536931436.

It is an arithmetic number, because the mean of its divisors is an integer number (328601290968).

Almost surely, 2^{1313331302221} is an apocalyptic number.

It is an amenable number.

1313331302221 is a deficient number, since it is larger than the sum of its proper divisors (1073861651).

1313331302221 is a wasteful number, since it uses less digits than its factorization.

1313331302221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073861650.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 1313331302221 its reverse (1222031333131), we get a palindrome (2535362635352).

The spelling of 1313331302221 in words is "one trillion, three hundred thirteen billion, three hundred thirty-one million, three hundred two thousand, two hundred twenty-one".