21232213210 has 16 divisors (see below), whose sum is σ = 41157828936. Its totient is φ = 7839586368.

The previous prime is 21232213201. The next prime is 21232213213. The reversal of 21232213210 is 1231223212.

21232213210 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16332073209 + 4900140001 = 127797^2 + 70001^2 .

It is not an unprimeable number, because it can be changed into a prime (21232213213) 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 7 ways as a sum of consecutive naturals, for example, 81662229 + ... + 81662488.

Almost surely, 2^21232213210 is an apocalyptic number.

21232213210 is a deficient number, since it is larger than the sum of its proper divisors (19925615726).

21232213210 is a wasteful number, since it uses less digits than its factorization.

21232213210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163324737.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21232213210 its reverse (1231223212), we get a palindrome (22463436422).

The spelling of 21232213210 in words is "twenty-one billion, two hundred thirty-two million, two hundred thirteen thousand, two hundred ten".