21232322201 has 4 divisors (see below), whose sum is σ = 21232699392. Its totient is φ = 21231945012.

The previous prime is 21232322173. The next prime is 21232322203. The reversal of 21232322201 is 10222323212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21232322201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232322203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85301 + ... + 223026.

It is an arithmetic number, because the mean of its divisors is an integer number (5308174848).

Almost surely, 2^21232322201 is an apocalyptic number.

It is an amenable number.

21232322201 is a deficient number, since it is larger than the sum of its proper divisors (377191).

21232322201 is an equidigital number, since it uses as much as digits as its factorization.

21232322201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377190.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21232322201 its reverse (10222323212), we get a palindrome (31454645413).

The spelling of 21232322201 in words is "twenty-one billion, two hundred thirty-two million, three hundred twenty-two thousand, two hundred one".