21203232001 has 8 divisors (see below), whose sum is σ = 25507647680. Its totient is φ = 17217661968.

The previous prime is 21203231969. The next prime is 21203232007. The reversal of 21203232001 is 10023230212.

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

It is a cyclic number.

It is not a de Polignac number, because 21203232001 - 2⁵ = 21203231969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203232007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79711266 + ... + 79711531.

It is an arithmetic number, because the mean of its divisors is an integer number (3188455960).

Almost surely, 2^21203232001 is an apocalyptic number.

It is an amenable number.

21203232001 is a deficient number, since it is larger than the sum of its proper divisors (4304415679).

21203232001 is a wasteful number, since it uses less digits than its factorization.

21203232001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159422823.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21203232001 its reverse (10023230212), we get a palindrome (31226462213).

The spelling of 21203232001 in words is "twenty-one billion, two hundred three million, two hundred thirty-two thousand, one".