1223444443221 has 144 divisors (see below), whose sum is σ = 2455337352832. Its totient is φ = 570809099520.

The previous prime is 1223444443171. The next prime is 1223444443237.

1223444443221 is a `hidden beast` number, since 12 + 2 + 344 + 44 + 43 + 221 = 666.

1223444443221 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1223444443221 - 2¹⁸ = 1223444181077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223444443261) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 3499830 + ... + 3833496.

Almost surely, 2^{1223444443221} is an apocalyptic number.

1223444443221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1223444443221 is an abundant number, since it is smaller than the sum of its proper divisors (1231892909611).

1223444443221 is a wasteful number, since it uses less digits than its factorization.

1223444443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333752 (or 333738 counting only the distinct ones).

The product of its digits is 147456, while the sum is 36.

It can be divided in two parts, 1223 and 444443221, that added together give a palindrome (444444444).

The spelling of 1223444443221 in words is "one trillion, two hundred twenty-three billion, four hundred forty-four million, four hundred forty-three thousand, two hundred twenty-one".