1001223333221 has 4 divisors (see below), whose sum is σ = 1001225866944. Its totient is φ = 1001220799500.

The previous prime is 1001223333181. The next prime is 1001223333263. The reversal of 1001223333221 is 1223333221001.

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 1001223333221 - 2²² = 1001219138917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001223338221) 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, 532055 + ... + 1511796.

It is an arithmetic number, because the mean of its divisors is an integer number (250306466736).

Almost surely, 2^{1001223333221} is an apocalyptic number.

It is an amenable number.

1001223333221 is a deficient number, since it is larger than the sum of its proper divisors (2533723).

1001223333221 is an equidigital number, since it uses as much as digits as its factorization.

1001223333221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533722.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1001223333221 its reverse (1223333221001), we get a palindrome (2224556554222).

It can be divided in two parts, 100122 and 3333221, that added together give a palindrome (3433343).

The spelling of 1001223333221 in words is "one trillion, one billion, two hundred twenty-three million, three hundred thirty-three thousand, two hundred twenty-one".