1321221232333 has 4 divisors (see below), whose sum is σ = 1321234465180. Its totient is φ = 1321207999488.

The previous prime is 1321221232319. The next prime is 1321221232339. The reversal of 1321221232333 is 3332321221231.

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 821120508649 + 500100723684 = 906157^2 + 707178^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321221232333 - 2⁹ = 1321221231821 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 (1321221232339) 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 3 ways as a sum of consecutive naturals, for example, 6465510 + ... + 6666727.

It is an arithmetic number, because the mean of its divisors is an integer number (330308616295).

Almost surely, 2^{1321221232333} is an apocalyptic number.

It is an amenable number.

1321221232333 is a deficient number, since it is larger than the sum of its proper divisors (13232847).

1321221232333 is a wasteful number, since it uses less digits than its factorization.

1321221232333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13232846.

The product of its digits is 7776, while the sum is 28.

Adding to 1321221232333 its reverse (3332321221231), we get a palindrome (4653542453564).

The spelling of 1321221232333 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-one million, two hundred thirty-two thousand, three hundred thirty-three".