1001003223221 has 4 divisors (see below), whose sum is σ = 1001007700812. Its totient is φ = 1000998745632.

The previous prime is 1001003223191. The next prime is 1001003223251. The reversal of 1001003223221 is 1223223001001.

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

It is an interprime number because it is at equal distance from previous prime (1001003223191) and next prime (1001003223251).

It can be written as a sum of positive squares in 2 ways, for example, as 261007570321 + 739995652900 = 510889^2 + 860230^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001003223221 - 2³⁸ = 726125316277 is a prime.

It is a super-2 number, since 2×1001003223221² (a number of 25 digits) contains 22 as substring.

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 1001003223221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001003223251) 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, 1884800 + ... + 2356793.

It is an arithmetic number, because the mean of its divisors is an integer number (250251925203).

Almost surely, 2^{1001003223221} is an apocalyptic number.

It is an amenable number.

1001003223221 is a deficient number, since it is larger than the sum of its proper divisors (4477591).

1001003223221 is an equidigital number, since it uses as much as digits as its factorization.

1001003223221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4477590.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1001003223221 its reverse (1223223001001), we get a palindrome (2224226224222).

The spelling of 1001003223221 in words is "one trillion, one billion, three million, two hundred twenty-three thousand, two hundred twenty-one".