1323211330421 has 4 divisors (see below), whose sum is σ = 1401047291052. Its totient is φ = 1245375369792.

The previous prime is 1323211330417. The next prime is 1323211330433. The reversal of 1323211330421 is 1240331123231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 361411380625 + 961799949796 = 601175^2 + 980714^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323211330421 - 2² = 1323211330417 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 (1323211330451) 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 3 ways as a sum of consecutive naturals, for example, 38917980290 + ... + 38917980323.

It is an arithmetic number, because the mean of its divisors is an integer number (350261822763).

Almost surely, 2^{1323211330421} is an apocalyptic number.

It is an amenable number.

1323211330421 is a deficient number, since it is larger than the sum of its proper divisors (77835960631).

1323211330421 is an equidigital number, since it uses as much as digits as its factorization.

1323211330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77835960630.

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

Adding to 1323211330421 its reverse (1240331123231), we get a palindrome (2563542453652).

The spelling of 1323211330421 in words is "one trillion, three hundred twenty-three billion, two hundred eleven million, three hundred thirty thousand, four hundred twenty-one".