1001223110221 has 4 divisors (see below), whose sum is σ = 1001225971744. Its totient is φ = 1001220248700.

The previous prime is 1001223110213. The next prime is 1001223110243. The reversal of 1001223110221 is 1220113221001.

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 1001223110221 - 2³ = 1001223110213 is a prime.

It is a super-2 number, since 2×1001223110221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001223110195 and 1001223110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001223110281) 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, 818625 + ... + 1634806.

It is an arithmetic number, because the mean of its divisors is an integer number (250306492936).

Almost surely, 2^{1001223110221} is an apocalyptic number.

It is an amenable number.

1001223110221 is a deficient number, since it is larger than the sum of its proper divisors (2861523).

1001223110221 is an equidigital number, since it uses as much as digits as its factorization.

1001223110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2861522.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1001223110221 its reverse (1220113221001), we get a palindrome (2221336331222).

The spelling of 1001223110221 in words is "one trillion, one billion, two hundred twenty-three million, one hundred ten thousand, two hundred twenty-one".