21220222210 has 48 divisors (see below), whose sum is σ = 42087672576. Its totient is φ = 7639640000.

The previous prime is 21220222193. The next prime is 21220222241. The reversal of 21220222210 is 1222202212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1112655 + ... + 1131565.

It is an arithmetic number, because the mean of its divisors is an integer number (876826512).

Almost surely, 2^21220222210 is an apocalyptic number.

21220222210 is a deficient number, since it is larger than the sum of its proper divisors (20867450366).

21220222210 is a wasteful number, since it uses less digits than its factorization.

21220222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19131 (or 19030 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21220222210 its reverse (1222202212), we get a palindrome (22442424422).

The spelling of 21220222210 in words is "twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred ten".