21001330210 has 16 divisors (see below), whose sum is σ = 43202736576. Its totient is φ = 7200456048.

The previous prime is 21001330187. The next prime is 21001330213. The reversal of 21001330210 is 1203310012.

It is not an unprimeable number, because it can be changed into a prime (21001330213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150009432 + ... + 150009571.

It is an arithmetic number, because the mean of its divisors is an integer number (2700171036).

Almost surely, 2^21001330210 is an apocalyptic number.

21001330210 is an abundant number, since it is smaller than the sum of its proper divisors (22201406366).

21001330210 is a wasteful number, since it uses less digits than its factorization.

21001330210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300019017.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 21001330210 its reverse (1203310012), we get a palindrome (22204640222).

The spelling of 21001330210 in words is "twenty-one billion, one million, three hundred thirty thousand, two hundred ten".