21022210212 has 24 divisors (see below), whose sum is σ = 49058972256. Its totient is φ = 7006382208.

The previous prime is 21022210193. The next prime is 21022210241. The reversal of 21022210212 is 21201222012.

It is a junction number, because it is equal to n+sod(n) for n = 21022210191 and 21022210200.

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, 39438 + ... + 208805.

It is an arithmetic number, because the mean of its divisors is an integer number (2044123844).

Almost surely, 2^21022210212 is an apocalyptic number.

It is an amenable number.

21022210212 is an abundant number, since it is smaller than the sum of its proper divisors (28036762044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21022210212 is a wasteful number, since it uses less digits than its factorization.

21022210212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255307 (or 255305 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21022210212 its reverse (21201222012), we get a palindrome (42223432224).

The spelling of 21022210212 in words is "twenty-one billion, twenty-two million, two hundred ten thousand, two hundred twelve".