221322131201 has 16 divisors (see below), whose sum is σ = 232849360128. Its totient is φ = 210123849600.

The previous prime is 221322131189. The next prime is 221322131209. The reversal of 221322131201 is 102131223122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221322131201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221322131209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246155 + ... + 709391.

It is an arithmetic number, because the mean of its divisors is an integer number (14553085008).

Almost surely, 2^221322131201 is an apocalyptic number.

It is an amenable number.

221322131201 is a deficient number, since it is larger than the sum of its proper divisors (11527228927).

221322131201 is a wasteful number, since it uses less digits than its factorization.

221322131201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463592.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 221322131201 its reverse (102131223122), we get a palindrome (323453354323).

It can be divided in two parts, 2213221 and 31201, that added together give a palindrome (2244422).

The spelling of 221322131201 in words is "two hundred twenty-one billion, three hundred twenty-two million, one hundred thirty-one thousand, two hundred one".