21201443332 has 24 divisors (see below), whose sum is σ = 38841840576. Its totient is φ = 10106778528.

The previous prime is 21201443287. The next prime is 21201443387. The reversal of 21201443332 is 23334410212.

It is a junction number, because it is equal to n+sod(n) for n = 21201443297 and 21201443306.

It is an unprimeable number.

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, 347083 + ... + 403570.

It is an arithmetic number, because the mean of its divisors is an integer number (1618410024).

Almost surely, 2^21201443332 is an apocalyptic number.

It is an amenable number.

21201443332 is a deficient number, since it is larger than the sum of its proper divisors (17640397244).

21201443332 is a wasteful number, since it uses less digits than its factorization.

21201443332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750987 (or 750985 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21201443332 its reverse (23334410212), we get a palindrome (44535853544).

The spelling of 21201443332 in words is "twenty-one billion, two hundred one million, four hundred forty-three thousand, three hundred thirty-two".