21002002233 has 16 divisors (see below), whose sum is σ = 28917345792. Its totient is φ = 13544352000.

The previous prime is 21002002163. The next prime is 21002002243. The reversal of 21002002233 is 33220020012.

It is not a de Polignac number, because 21002002233 - 2⁹ = 21002001721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21002002243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200673 + ... + 286833.

It is an arithmetic number, because the mean of its divisors is an integer number (1807334112).

Almost surely, 2^21002002233 is an apocalyptic number.

It is an amenable number.

21002002233 is a deficient number, since it is larger than the sum of its proper divisors (7915343559).

21002002233 is a wasteful number, since it uses less digits than its factorization.

21002002233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88816.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21002002233 its reverse (33220020012), we get a palindrome (54222022245).

The spelling of 21002002233 in words is "twenty-one billion, two million, two thousand, two hundred thirty-three".