21020102330 has 8 divisors (see below), whose sum is σ = 37836184212. Its totient is φ = 8408040928.

The previous prime is 21020102291. The next prime is 21020102333. The reversal of 21020102330 is 3320102012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21020070289 + 32041 = 144983^2 + 179^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21020102333) 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 3 ways as a sum of consecutive naturals, for example, 1051005107 + ... + 1051005126.

Almost surely, 2^21020102330 is an apocalyptic number.

21020102330 is a deficient number, since it is larger than the sum of its proper divisors (16816081882).

21020102330 is a wasteful number, since it uses less digits than its factorization.

21020102330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2102010240.

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

Adding to 21020102330 its reverse (3320102012), we get a palindrome (24340204342).

The spelling of 21020102330 in words is "twenty-one billion, twenty million, one hundred two thousand, three hundred thirty".