1221243242344 has 16 divisors (see below), whose sum is σ = 2290572411300. Its totient is φ = 610423932672.

The previous prime is 1221243242339. The next prime is 1221243242353. The reversal of 1221243242344 is 4432423421221.

It can be written as a sum of positive squares in 2 ways, for example, as 1013972469444 + 207270772900 = 1006962^2 + 455270^2 .

It is a super-2 number, since 2×1221243242344² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 24684807 + ... + 24734230.

Almost surely, 2^{1221243242344} is an apocalyptic number.

It is an amenable number.

1221243242344 is a deficient number, since it is larger than the sum of its proper divisors (1069329168956).

1221243242344 is a wasteful number, since it uses less digits than its factorization.

1221243242344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49422132 (or 49422128 counting only the distinct ones).

The product of its digits is 73728, while the sum is 34.

Adding to 1221243242344 its reverse (4432423421221), we get a palindrome (5653666663565).

The spelling of 1221243242344 in words is "one trillion, two hundred twenty-one billion, two hundred forty-three million, two hundred forty-two thousand, three hundred forty-four".