321011331221 has 8 divisors (see below), whose sum is σ = 379520785920. Its totient is φ = 265664549808.

The previous prime is 321011331217. The next prime is 321011331227. The reversal of 321011331221 is 122133110123.

It is a happy number.

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

It is not a de Polignac number, because 321011331221 - 2² = 321011331217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321011331193 and 321011331202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321011331227) 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, 790668101 + ... + 790668506.

It is an arithmetic number, because the mean of its divisors is an integer number (47440098240).

Almost surely, 2^321011331221 is an apocalyptic number.

It is an amenable number.

321011331221 is a deficient number, since it is larger than the sum of its proper divisors (58509454699).

321011331221 is a wasteful number, since it uses less digits than its factorization.

321011331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581336643.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 321011331221 its reverse (122133110123), we get a palindrome (443144441344).

The spelling of 321011331221 in words is "three hundred twenty-one billion, eleven million, three hundred thirty-one thousand, two hundred twenty-one".