21313232001 has 20 divisors (see below), whose sum is σ = 31842434052. Its totient is φ = 14206969728.

The previous prime is 21313231997. The next prime is 21313232011. The reversal of 21313232001 is 10023231312.

21313232001 is a `hidden beast` number, since 213 + 132 + 320 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8786250225 + 12526981776 = 93735^2 + 111924^2 .

It is not a de Polignac number, because 21313232001 - 2² = 21313231997 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21313232011) 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 19 ways as a sum of consecutive naturals, for example, 927685 + ... + 950381.

Almost surely, 2^21313232001 is an apocalyptic number.

It is an amenable number.

21313232001 is a deficient number, since it is larger than the sum of its proper divisors (10529202051).

21313232001 is a wasteful number, since it uses less digits than its factorization.

21313232001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34302 (or 34293 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21313232001 its reverse (10023231312), we get a palindrome (31336463313).

The spelling of 21313232001 in words is "twenty-one billion, three hundred thirteen million, two hundred thirty-two thousand, one".