221001323321311 has 4 divisors (see below), whose sum is σ = 238001425115272. Its totient is φ = 204001221527352.

The previous prime is 221001323321297. The next prime is 221001323321341. The reversal of 221001323321311 is 113123323100122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221001323321311 - 2⁵ = 221001323321279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221001323321341) 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, 8500050896961 + ... + 8500050896986.

It is an arithmetic number, because the mean of its divisors is an integer number (59500356278818).

Almost surely, 2^{221001323321311} is an apocalyptic number.

221001323321311 is a deficient number, since it is larger than the sum of its proper divisors (17000101793961).

221001323321311 is a wasteful number, since it uses less digits than its factorization.

221001323321311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17000101793960.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 221001323321311 its reverse (113123323100122), we get a palindrome (334124646421433).

The spelling of 221001323321311 in words is "two hundred twenty-one trillion, one billion, three hundred twenty-three million, three hundred twenty-one thousand, three hundred eleven".