2001321232223 has 4 divisors (see below), whose sum is σ = 2001329657640. Its totient is φ = 2001312806808.

The previous prime is 2001321232199. The next prime is 2001321232259. The reversal of 2001321232223 is 3222321231002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001321232223 - 2¹⁰ = 2001321231199 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 (2001321232723) 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, 3845753 + ... + 4335026.

It is an arithmetic number, because the mean of its divisors is an integer number (500332414410).

Almost surely, 2^{2001321232223} is an apocalyptic number.

2001321232223 is a deficient number, since it is larger than the sum of its proper divisors (8425417).

2001321232223 is an equidigital number, since it uses as much as digits as its factorization.

2001321232223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8425416.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 2001321232223 its reverse (3222321231002), we get a palindrome (5223642463225).

The spelling of 2001321232223 in words is "two trillion, one billion, three hundred twenty-one million, two hundred thirty-two thousand, two hundred twenty-three".