1303221130221 has 4 divisors (see below), whose sum is σ = 1737628173632. Its totient is φ = 868814086812.

The previous prime is 1303221130213. The next prime is 1303221130223. The reversal of 1303221130221 is 1220311223031.

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 1303221130221 - 2³ = 1303221130213 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 (1303221130223) 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, 217203521701 + ... + 217203521706.

It is an arithmetic number, because the mean of its divisors is an integer number (434407043408).

Almost surely, 2^{1303221130221} is an apocalyptic number.

It is an amenable number.

1303221130221 is a deficient number, since it is larger than the sum of its proper divisors (434407043411).

1303221130221 is an equidigital number, since it uses as much as digits as its factorization.

1303221130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434407043410.

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

Adding to 1303221130221 its reverse (1220311223031), we get a palindrome (2523532353252).

The spelling of 1303221130221 in words is "one trillion, three hundred three billion, two hundred twenty-one million, one hundred thirty thousand, two hundred twenty-one".