1313020213221 has 4 divisors (see below), whose sum is σ = 1750693617632. Its totient is φ = 875346808812.

The previous prime is 1313020213201. The next prime is 1313020213243. The reversal of 1313020213221 is 1223120203131.

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 not a de Polignac number, because 1313020213221 - 2⁷ = 1313020213093 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 (1313020213201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218836702201 + ... + 218836702206.

It is an arithmetic number, because the mean of its divisors is an integer number (437673404408).

Almost surely, 2^{1313020213221} is an apocalyptic number.

It is an amenable number.

1313020213221 is a deficient number, since it is larger than the sum of its proper divisors (437673404411).

1313020213221 is an equidigital number, since it uses as much as digits as its factorization.

1313020213221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437673404410.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1313020213221 its reverse (1223120203131), we get a palindrome (2536140416352).

The spelling of 1313020213221 in words is "one trillion, three hundred thirteen billion, twenty million, two hundred thirteen thousand, two hundred twenty-one".