321323132013221 has 4 divisors (see below), whose sum is σ = 346040296014252. Its totient is φ = 296605968012192.

The previous prime is 321323132013187. The next prime is 321323132013319. The reversal of 321323132013221 is 122310231323123.

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 13675425880900 + 307647706132321 = 3698030^2 + 17539889^2 .

It is a cyclic number.

It is not a de Polignac number, because 321323132013221 - 2⁶ = 321323132013157 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 (321373132013221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12358582000496 + ... + 12358582000521.

It is an arithmetic number, because the mean of its divisors is an integer number (86510074003563).

Almost surely, 2^{321323132013221} is an apocalyptic number.

It is an amenable number.

321323132013221 is a deficient number, since it is larger than the sum of its proper divisors (24717164001031).

321323132013221 is a wasteful number, since it uses less digits than its factorization.

321323132013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24717164001030.

The product of its (nonzero) digits is 7776, while the sum is 29.

Adding to 321323132013221 its reverse (122310231323123), we get a palindrome (443633363336344).

The spelling of 321323132013221 in words is "three hundred twenty-one trillion, three hundred twenty-three billion, one hundred thirty-two million, thirteen thousand, two hundred twenty-one".