321011320211 has 4 divisors (see below), whose sum is σ = 321012655800. Its totient is φ = 321009984624.

The previous prime is 321011320181. The next prime is 321011320243. The reversal of 321011320211 is 112023110123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 112023110123 = 229 ⋅489183887.

It is a cyclic number.

It is not a de Polignac number, because 321011320211 - 2³⁸ = 46133413267 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 321011320211.

It is not an unprimeable number, because it can be changed into a prime (321011320291) 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, 196301 + ... + 824958.

It is an arithmetic number, because the mean of its divisors is an integer number (80253163950).

Almost surely, 2^321011320211 is an apocalyptic number.

321011320211 is a deficient number, since it is larger than the sum of its proper divisors (1335589).

321011320211 is a wasteful number, since it uses less digits than its factorization.

321011320211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1335588.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321011320211 its reverse (112023110123), we get a palindrome (433034430334).

The spelling of 321011320211 in words is "three hundred twenty-one billion, eleven million, three hundred twenty thousand, two hundred eleven".