1221442440223 has 8 divisors (see below), whose sum is σ = 1233523328400. Its totient is φ = 1209377461248.

The previous prime is 1221442440203. The next prime is 1221442440319. The reversal of 1221442440223 is 3220442441221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1221442440223 - 2¹⁷ = 1221442309151 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 (1221442440203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3822961 + ... + 4130122.

It is an arithmetic number, because the mean of its divisors is an integer number (154190416050).

Almost surely, 2^{1221442440223} is an apocalyptic number.

1221442440223 is a deficient number, since it is larger than the sum of its proper divisors (12080888177).

1221442440223 is a wasteful number, since it uses less digits than its factorization.

1221442440223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7954601.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 1221442440223 its reverse (3220442441221), we get a palindrome (4441884881444).

The spelling of 1221442440223 in words is "one trillion, two hundred twenty-one billion, four hundred forty-two million, four hundred forty thousand, two hundred twenty-three".