21201002330 has 64 divisors (see below), whose sum is σ = 40087208448. Its totient is φ = 8057702400.

The previous prime is 21201002327. The next prime is 21201002341. The reversal of 21201002330 is 3320010212.

It is a happy number.

It is an unprimeable number.

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, 42148859 + ... + 42149361.

It is an arithmetic number, because the mean of its divisors is an integer number (626362632).

Almost surely, 2^21201002330 is an apocalyptic number.

21201002330 is a deficient number, since it is larger than the sum of its proper divisors (18886206118).

21201002330 is a wasteful number, since it uses less digits than its factorization.

21201002330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21201002330 its reverse (3320010212), we get a palindrome (24521012542).

The spelling of 21201002330 in words is "twenty-one billion, two hundred one million, two thousand, three hundred thirty".