1213223132321 has 16 divisors (see below), whose sum is σ = 1247649422976. Its totient is φ = 1179376800000.

The previous prime is 1213223132309. The next prime is 1213223132339. The reversal of 1213223132321 is 1232313223121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213223132321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213223132351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1377206 + ... + 2079216.

It is an arithmetic number, because the mean of its divisors is an integer number (77978088936).

Almost surely, 2^{1213223132321} is an apocalyptic number.

It is an amenable number.

1213223132321 is a deficient number, since it is larger than the sum of its proper divisors (34426290655).

1213223132321 is a wasteful number, since it uses less digits than its factorization.

1213223132321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702424.

The product of its digits is 2592, while the sum is 26.

Adding to 1213223132321 its reverse (1232313223121), we get a palindrome (2445536355442).

The spelling of 1213223132321 in words is "one trillion, two hundred thirteen billion, two hundred twenty-three million, one hundred thirty-two thousand, three hundred twenty-one".