21332043001 has 4 divisors (see below), whose sum is σ = 21378116992. Its totient is φ = 21285969012.

The previous prime is 21332042959. The next prime is 21332043049. The reversal of 21332043001 is 10034023312.

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 not a de Polignac number, because 21332043001 - 2¹⁹ = 21331518713 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 21332043001.

It is not an unprimeable number, because it can be changed into a prime (21332043401) 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, 23036301 + ... + 23037226.

It is an arithmetic number, because the mean of its divisors is an integer number (5344529248).

Almost surely, 2^21332043001 is an apocalyptic number.

It is an amenable number.

21332043001 is a deficient number, since it is larger than the sum of its proper divisors (46073991).

21332043001 is an equidigital number, since it uses as much as digits as its factorization.

21332043001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46073990.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21332043001 its reverse (10034023312), we get a palindrome (31366066313).

The spelling of 21332043001 in words is "twenty-one billion, three hundred thirty-two million, forty-three thousand, one".