1221444530313 has 64 divisors (see below), whose sum is σ = 1969307074560. Its totient is φ = 657832788288.

The previous prime is 1221444530281. The next prime is 1221444530329. The reversal of 1221444530313 is 3130354441221.

It is not a de Polignac number, because 1221444530313 - 2⁵ = 1221444530281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1221444530333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 72597220 + ... + 72614042.

It is an arithmetic number, because the mean of its divisors is an integer number (30770423040).

Almost surely, 2^{1221444530313} is an apocalyptic number.

It is an amenable number.

1221444530313 is a deficient number, since it is larger than the sum of its proper divisors (747862544247).

1221444530313 is a wasteful number, since it uses less digits than its factorization.

1221444530313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17778.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 1221444530313 its reverse (3130354441221), we get a palindrome (4351798971534).

The spelling of 1221444530313 in words is "one trillion, two hundred twenty-one billion, four hundred forty-four million, five hundred thirty thousand, three hundred thirteen".