1303424221321 has 4 divisors (see below), whose sum is σ = 1303524628992. Its totient is φ = 1303323813652.

The previous prime is 1303424221277. The next prime is 1303424221331. The reversal of 1303424221321 is 1231224243031.

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 not a de Polignac number, because 1303424221321 - 2¹⁵ = 1303424188553 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 1303424221321.

It is not an unprimeable number, because it can be changed into a prime (1303424221331) 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, 50184361 + ... + 50210326.

It is an arithmetic number, because the mean of its divisors is an integer number (325881157248).

Almost surely, 2^{1303424221321} is an apocalyptic number.

It is an amenable number.

1303424221321 is a deficient number, since it is larger than the sum of its proper divisors (100407671).

1303424221321 is a wasteful number, since it uses less digits than its factorization.

1303424221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100407670.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1303424221321 its reverse (1231224243031), we get a palindrome (2534648464352).

The spelling of 1303424221321 in words is "one trillion, three hundred three billion, four hundred twenty-four million, two hundred twenty-one thousand, three hundred twenty-one".