1223443301221 has 16 divisors (see below), whose sum is σ = 1334683132848. Its totient is φ = 1117084262400.

The previous prime is 1223443301173. The next prime is 1223443301263. The reversal of 1223443301221 is 1221033443221.

It can be written as a sum of positive squares in 8 ways, for example, as 9601256196 + 1213842045025 = 97986^2 + 1101745^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223443301221 - 2¹³ = 1223443293029 is a prime.

It is a super-2 number, since 2×1223443301221² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1223443301221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223443301921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8005060 + ... + 8156461.

It is an arithmetic number, because the mean of its divisors is an integer number (83417695803).

Almost surely, 2^{1223443301221} is an apocalyptic number.

It is an amenable number.

1223443301221 is a deficient number, since it is larger than the sum of its proper divisors (111239831627).

1223443301221 is a wasteful number, since it uses less digits than its factorization.

1223443301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16161672.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1223443301221 its reverse (1221033443221), we get a palindrome (2444476744442).

The spelling of 1223443301221 in words is "one trillion, two hundred twenty-three billion, four hundred forty-three million, three hundred one thousand, two hundred twenty-one".