1003221113021 has 4 divisors (see below), whose sum is σ = 1003230190812. Its totient is φ = 1003212035232.

The previous prime is 1003221112973. The next prime is 1003221113077. The reversal of 1003221113021 is 1203111223001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 359896807396 + 643324305625 = 599914^2 + 802075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1003221113021 - 2¹⁴ = 1003221096637 is a prime.

It is a super-2 number, since 2×1003221113021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1003221118021) 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, 4371056 + ... + 4594841.

It is an arithmetic number, because the mean of its divisors is an integer number (250807547703).

Almost surely, 2^{1003221113021} is an apocalyptic number.

It is an amenable number.

1003221113021 is a deficient number, since it is larger than the sum of its proper divisors (9077791).

1003221113021 is an equidigital number, since it uses as much as digits as its factorization.

1003221113021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9077790.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1003221113021 its reverse (1203111223001), we get a palindrome (2206332336022).

The spelling of 1003221113021 in words is "one trillion, three billion, two hundred twenty-one million, one hundred thirteen thousand, twenty-one".