21031232201 has 8 divisors (see below), whose sum is σ = 24188788800. Its totient is φ = 17911949328.

The previous prime is 21031232171. The next prime is 21031232207. The reversal of 21031232201 is 10223213012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21031232201 - 2¹⁸ = 21030970057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21031232201.

It is not an unprimeable number, because it can be changed into a prime (21031232207) 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 7 ways as a sum of consecutive naturals, for example, 9567251 + ... + 9569448.

It is an arithmetic number, because the mean of its divisors is an integer number (3023598600).

Almost surely, 2^21031232201 is an apocalyptic number.

It is an amenable number.

21031232201 is a deficient number, since it is larger than the sum of its proper divisors (3157556599).

21031232201 is a wasteful number, since it uses less digits than its factorization.

21031232201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19136863.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21031232201 its reverse (10223213012), we get a palindrome (31254445213).

The spelling of 21031232201 in words is "twenty-one billion, thirty-one million, two hundred thirty-two thousand, two hundred one".