21331433001 has 8 divisors (see below), whose sum is σ = 28599049024. Its totient is φ = 14142386160.

The previous prime is 21331432963. The next prime is 21331433021. The reversal of 21331433001 is 10033413312.

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

It is not a de Polignac number, because 21331433001 - 2⁹ = 21331432489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21331433021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19641661 + ... + 19642746.

It is an arithmetic number, because the mean of its divisors is an integer number (3574881128).

Almost surely, 2^21331433001 is an apocalyptic number.

It is an amenable number.

21331433001 is a deficient number, since it is larger than the sum of its proper divisors (7267616023).

21331433001 is a wasteful number, since it uses less digits than its factorization.

21331433001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39284591.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 21331433001 its reverse (10033413312), we get a palindrome (31364846313).

The spelling of 21331433001 in words is "twenty-one billion, three hundred thirty-one million, four hundred thirty-three thousand, one".