1303213323221 has 4 divisors (see below), whose sum is σ = 1303969687872. Its totient is φ = 1302456958572.

The previous prime is 1303213323211. The next prime is 1303213323227. The reversal of 1303213323221 is 1223233123031.

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 a de Polignac number, because none of the positive numbers 2^k-1303213323221 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 (1303213323227) 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, 378179741 + ... + 378183186.

It is an arithmetic number, because the mean of its divisors is an integer number (325992421968).

Almost surely, 2^{1303213323221} is an apocalyptic number.

It is an amenable number.

1303213323221 is a deficient number, since it is larger than the sum of its proper divisors (756364651).

1303213323221 is an equidigital number, since it uses as much as digits as its factorization.

1303213323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756364650.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 1303213323221 its reverse (1223233123031), we get a palindrome (2526446446252).

The spelling of 1303213323221 in words is "one trillion, three hundred three billion, two hundred thirteen million, three hundred twenty-three thousand, two hundred twenty-one".