1223012323221 has 20 divisors (see below), whose sum is σ = 1766568721632. Its totient is φ = 752622915408.

The previous prime is 1223012323201. The next prime is 1223012323283. The reversal of 1223012323221 is 1223232103221.

It is not a de Polignac number, because 1223012323221 - 2¹⁰ = 1223012322197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1223012323191 and 1223012323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223012323201) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7051161 + ... + 7222526.

Almost surely, 2^{1223012323221} is an apocalyptic number.

It is an amenable number.

1223012323221 is a deficient number, since it is larger than the sum of its proper divisors (543556398411).

1223012323221 is an frugal number, since it uses more digits than its factorization.

1223012323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14273742 (or 14273703 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1223012323221 its reverse (1223232103221), we get a palindrome (2446244426442).

The spelling of 1223012323221 in words is "one trillion, two hundred twenty-three billion, twelve million, three hundred twenty-three thousand, two hundred twenty-one".