2001223221223 has 4 divisors (see below), whose sum is σ = 2001246135408. Its totient is φ = 2001200307040.

The previous prime is 2001223221169. The next prime is 2001223221227. The reversal of 2001223221223 is 3221223221002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001223221223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001223221194 and 2001223221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001223221227) 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, 11325586 + ... + 11500927.

It is an arithmetic number, because the mean of its divisors is an integer number (500311533852).

Almost surely, 2^{2001223221223} is an apocalyptic number.

2001223221223 is a deficient number, since it is larger than the sum of its proper divisors (22914185).

2001223221223 is an equidigital number, since it uses as much as digits as its factorization.

2001223221223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22914184.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 2001223221223 its reverse (3221223221002), we get a palindrome (5222446442225).

The spelling of 2001223221223 in words is "two trillion, one billion, two hundred twenty-three million, two hundred twenty-one thousand, two hundred twenty-three".