321213133213221 has 8 divisors (see below), whose sum is σ = 453477364536384. Its totient is φ = 201545495349440.

The previous prime is 321213133213169. The next prime is 321213133213243. The reversal of 321213133213221 is 122312331312123.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321213133213221 - 2⁶ = 321213133213157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321213133213261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3149148364785 + ... + 3149148364886.

It is an arithmetic number, because the mean of its divisors is an integer number (56684670567048).

Almost surely, 2^{321213133213221} is an apocalyptic number.

It is an amenable number.

321213133213221 is a deficient number, since it is larger than the sum of its proper divisors (132264231323163).

321213133213221 is a wasteful number, since it uses less digits than its factorization.

321213133213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6298296729691.

The product of its digits is 7776, while the sum is 30.

Adding to 321213133213221 its reverse (122312331312123), we get a palindrome (443525464525344).

The spelling of 321213133213221 in words is "three hundred twenty-one trillion, two hundred thirteen billion, one hundred thirty-three million, two hundred thirteen thousand, two hundred twenty-one".