321132211021 has 4 divisors (see below), whose sum is σ = 321225000444. Its totient is φ = 321039421600.

The previous prime is 321132211009. The next prime is 321132211067. The reversal of 321132211021 is 120112231123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120112231123 = 14083 ⋅8528881.

It can be written as a sum of positive squares in 2 ways, for example, as 61963655625 + 259168555396 = 248925^2 + 509086^2 .

It is a cyclic number.

It is not a de Polignac number, because 321132211021 - 2¹³ = 321132202829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 321132211021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321132221021) 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, 46389520 + ... + 46396441.

It is an arithmetic number, because the mean of its divisors is an integer number (80306250111).

Almost surely, 2^321132211021 is an apocalyptic number.

It is an amenable number.

321132211021 is a deficient number, since it is larger than the sum of its proper divisors (92789423).

321132211021 is an equidigital number, since it uses as much as digits as its factorization.

321132211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92789422.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 321132211021 its reverse (120112231123), we get a palindrome (441244442144).

The spelling of 321132211021 in words is "three hundred twenty-one billion, one hundred thirty-two million, two hundred eleven thousand, twenty-one".