1303220221013 has 4 divisors (see below), whose sum is σ = 1303224189228. Its totient is φ = 1303216252800.

The previous prime is 1303220220941. The next prime is 1303220221021. The reversal of 1303220221013 is 3101220223031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1014729846244 + 288490374769 = 1007338^2 + 537113^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303220221013 - 2¹² = 1303220216917 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 (1303220221213) 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, 1442138 + ... + 2164763.

It is an arithmetic number, because the mean of its divisors is an integer number (325806047307).

Almost surely, 2^{1303220221013} is an apocalyptic number.

It is an amenable number.

1303220221013 is a deficient number, since it is larger than the sum of its proper divisors (3968215).

1303220221013 is an equidigital number, since it uses as much as digits as its factorization.

1303220221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968214.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1303220221013 its reverse (3101220223031), we get a palindrome (4404440444044).

The spelling of 1303220221013 in words is "one trillion, three hundred three billion, two hundred twenty million, two hundred twenty-one thousand, thirteen".