21002102330 has 32 divisors (see below), whose sum is σ = 41435990208. Its totient is φ = 7600924800.

The previous prime is 21002102227. The next prime is 21002102339. The reversal of 21002102330 is 3320120012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21002102339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 429227 + ... + 475646.

It is an arithmetic number, because the mean of its divisors is an integer number (1294874694).

Almost surely, 2^21002102330 is an apocalyptic number.

21002102330 is a deficient number, since it is larger than the sum of its proper divisors (20433887878).

21002102330 is a wasteful number, since it uses less digits than its factorization.

21002102330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905102.

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

Adding to 21002102330 its reverse (3320120012), we get a palindrome (24322222342).

The spelling of 21002102330 in words is "twenty-one billion, two million, one hundred two thousand, three hundred thirty".