1323223012021 has 4 divisors (see below), whose sum is σ = 1365907625344. Its totient is φ = 1280538398700.

The previous prime is 1323223012009. The next prime is 1323223012109. The reversal of 1323223012021 is 1202103223231.

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 1323223012021 - 2⁵ = 1323223011989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1323223011983 and 1323223012001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1323223016021) 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, 21342306615 + ... + 21342306676.

It is an arithmetic number, because the mean of its divisors is an integer number (341476906336).

Almost surely, 2^{1323223012021} is an apocalyptic number.

It is an amenable number.

1323223012021 is a deficient number, since it is larger than the sum of its proper divisors (42684613323).

1323223012021 is an equidigital number, since it uses as much as digits as its factorization.

1323223012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42684613322.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1323223012021 its reverse (1202103223231), we get a palindrome (2525326235252).

The spelling of 1323223012021 in words is "one trillion, three hundred twenty-three billion, two hundred twenty-three million, twelve thousand, twenty-one".