21022210210 has 16 divisors (see below), whose sum is σ = 37888073856. Its totient is φ = 8398196208.

The previous prime is 21022210193. The next prime is 21022210241. The reversal of 21022210210 is 1201222012.

It is a happy number.

It is a super-2 number, since 2×21022210210² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1327722 + ... + 1343461.

It is an arithmetic number, because the mean of its divisors is an integer number (2368004616).

Almost surely, 2^21022210210 is an apocalyptic number.

21022210210 is a deficient number, since it is larger than the sum of its proper divisors (16865863646).

21022210210 is a wasteful number, since it uses less digits than its factorization.

21022210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671977.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21022210210 its reverse (1201222012), we get a palindrome (22223432222).

The spelling of 21022210210 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, two hundred ten".