21030022210 has 16 divisors (see below), whose sum is σ = 40080748536. Its totient is φ = 7917184768.

The previous prime is 21030022157. The next prime is 21030022213. The reversal of 21030022210 is 1222003012.

It can be written as a sum of positive squares in 4 ways, for example, as 15151886649 + 5878135561 = 123093^2 + 76669^2 .

It is not an unprimeable number, because it can be changed into a prime (21030022213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61852837 + ... + 61853176.

Almost surely, 2^21030022210 is an apocalyptic number.

21030022210 is a deficient number, since it is larger than the sum of its proper divisors (19050726326).

21030022210 is a wasteful number, since it uses less digits than its factorization.

21030022210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123706037.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21030022210 its reverse (1222003012), we get a palindrome (22252025222).

The spelling of 21030022210 in words is "twenty-one billion, thirty million, twenty-two thousand, two hundred ten".