1003221221321 has 4 divisors (see below), whose sum is σ = 1094423150544. Its totient is φ = 912019292100.

The previous prime is 1003221221263. The next prime is 1003221221369. The reversal of 1003221221321 is 1231221223001.

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 1003221221321 - 2²² = 1003217027017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1003221221293 and 1003221221302.

It is not an unprimeable number, because it can be changed into a prime (1003221221371) 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, 45600964595 + ... + 45600964616.

It is an arithmetic number, because the mean of its divisors is an integer number (273605787636).

Almost surely, 2^{1003221221321} is an apocalyptic number.

1003221221321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1003221221321 is a deficient number, since it is larger than the sum of its proper divisors (91201929223).

1003221221321 is an equidigital number, since it uses as much as digits as its factorization.

1003221221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91201929222.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1003221221321 its reverse (1231221223001), we get a palindrome (2234442444322).

The spelling of 1003221221321 in words is "one trillion, three billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-one".