21331433301 has 32 divisors (see below), whose sum is σ = 29881958400. Its totient is φ = 13521217920.

The previous prime is 21331433287. The next prime is 21331433309. The reversal of 21331433301 is 10333413312.

It is a happy number.

It is not a de Polignac number, because 21331433301 - 2⁹ = 21331432789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331433309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1373940 + ... + 1389378.

It is an arithmetic number, because the mean of its divisors is an integer number (933811200).

Almost surely, 2^21331433301 is an apocalyptic number.

It is an amenable number.

21331433301 is a deficient number, since it is larger than the sum of its proper divisors (8550525099).

21331433301 is a wasteful number, since it uses less digits than its factorization.

21331433301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15769.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21331433301 its reverse (10333413312), we get a palindrome (31664846613).

The spelling of 21331433301 in words is "twenty-one billion, three hundred thirty-one million, four hundred thirty-three thousand, three hundred one".