321020011312221 has 32 divisors (see below), whose sum is σ = 470795658117120. Its totient is φ = 193332633937344.

The previous prime is 321020011312219. The next prime is 321020011312241. The reversal of 321020011312221 is 122213110020123.

It is not a de Polignac number, because 321020011312221 - 2¹ = 321020011312219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321020011312241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16996626 + ... + 30511068.

It is an arithmetic number, because the mean of its divisors is an integer number (14712364316160).

Almost surely, 2^{321020011312221} is an apocalyptic number.

It is an amenable number.

321020011312221 is a deficient number, since it is larger than the sum of its proper divisors (149775646804899).

321020011312221 is a wasteful number, since it uses less digits than its factorization.

321020011312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13527465.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 321020011312221 its reverse (122213110020123), we get a palindrome (443233121332344).

The spelling of 321020011312221 in words is "three hundred twenty-one trillion, twenty billion, eleven million, three hundred twelve thousand, two hundred twenty-one".