1321221303 has 12 divisors (see below), whose sum is σ = 1908806328. Its totient is φ = 880640880.

The previous prime is 1321221289. The next prime is 1321221313. The reversal of 1321221303 is 3031221231.

It is not a de Polignac number, because 1321221303 - 2¹³ = 1321213111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321221313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48076 + ... + 70382.

It is an arithmetic number, because the mean of its divisors is an integer number (159067194).

Almost surely, 2^1321221303 is an apocalyptic number.

1321221303 is a deficient number, since it is larger than the sum of its proper divisors (587585025).

1321221303 is a wasteful number, since it uses less digits than its factorization.

1321221303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28894 (or 28891 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1321221303 is about 36348.6079926041. The cubic root of 1321221303 is about 1097.2995198724.

Adding to 1321221303 its reverse (3031221231), we get a palindrome (4352442534).

The spelling of 1321221303 in words is "one billion, three hundred twenty-one million, two hundred twenty-one thousand, three hundred three".