1223323231021 has 4 divisors (see below), whose sum is σ = 1223336736000. Its totient is φ = 1223309726044.

The previous prime is 1223323231007. The next prime is 1223323231043. The reversal of 1223323231021 is 1201323233221.

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 1223323231021 - 2⁹ = 1223323230509 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 (1223323231061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6615691 + ... + 6798088.

It is an arithmetic number, because the mean of its divisors is an integer number (305834184000).

Almost surely, 2^{1223323231021} is an apocalyptic number.

It is an amenable number.

1223323231021 is a deficient number, since it is larger than the sum of its proper divisors (13504979).

1223323231021 is an equidigital number, since it uses as much as digits as its factorization.

1223323231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13504978.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1223323231021 its reverse (1201323233221), we get a palindrome (2424646464242).

The spelling of 1223323231021 in words is "one trillion, two hundred twenty-three billion, three hundred twenty-three million, two hundred thirty-one thousand, twenty-one".