21022303210 has 8 divisors (see below), whose sum is σ = 37840145796. Its totient is φ = 8408921280.

The previous prime is 21022303199. The next prime is 21022303217. The reversal of 21022303210 is 1230322012.

It can be written as a sum of positive squares in 2 ways, for example, as 19854782649 + 1167520561 = 140907^2 + 34169^2 .

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 (21022303217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1051115151 + ... + 1051115170.

Almost surely, 2^21022303210 is an apocalyptic number.

21022303210 is a deficient number, since it is larger than the sum of its proper divisors (16817842586).

21022303210 is a wasteful number, since it uses less digits than its factorization.

21022303210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102230328.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 21022303210 its reverse (1230322012), we get a palindrome (22252625222).

The spelling of 21022303210 in words is "twenty-one billion, twenty-two million, three hundred three thousand, two hundred ten".