21322232201 has 4 divisors (see below), whose sum is σ = 22576481172. Its totient is φ = 20067983232.

The previous prime is 21322232153. The next prime is 21322232209. The reversal of 21322232201 is 10223222312.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19532857600 + 1789374601 = 139760^2 + 42301^2 .

It is a cyclic number.

It is not a de Polignac number, because 21322232201 - 2³⁰ = 20248490377 is a prime.

It is a super-2 number, since 2×21322232201² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21322232209) 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, 627124460 + ... + 627124493.

It is an arithmetic number, because the mean of its divisors is an integer number (5644120293).

Almost surely, 2^21322232201 is an apocalyptic number.

It is an amenable number.

21322232201 is a deficient number, since it is larger than the sum of its proper divisors (1254248971).

21322232201 is a wasteful number, since it uses less digits than its factorization.

21322232201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254248970.

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

Adding to 21322232201 its reverse (10223222312), we get a palindrome (31545454513).

The spelling of 21322232201 in words is "twenty-one billion, three hundred twenty-two million, two hundred thirty-two thousand, two hundred one".