7313801221 has 4 divisors (see below), whose sum is σ = 7401919392. Its totient is φ = 7225683052.

The previous prime is 7313801219. The next prime is 7313801227. The reversal of 7313801221 is 1221083137.

7313801221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1221083137 = 12893 ⋅94709.

It is a cyclic number.

It is not a de Polignac number, because 7313801221 - 2¹ = 7313801219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7313801221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7313801227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44058961 + ... + 44059126.

It is an arithmetic number, because the mean of its divisors is an integer number (1850479848).

Almost surely, 2^7313801221 is an apocalyptic number.

It is an amenable number.

7313801221 is a deficient number, since it is larger than the sum of its proper divisors (88118171).

7313801221 is an equidigital number, since it uses as much as digits as its factorization.

7313801221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88118170.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 7313801221 is about 85520.7648527537. The cubic root of 7313801221 is about 1941.0991416426.

Adding to 7313801221 its reverse (1221083137), we get a palindrome (8534884358).

The spelling of 7313801221 in words is "seven billion, three hundred thirteen million, eight hundred one thousand, two hundred twenty-one".