22121322210 has 128 divisors (see below), whose sum is σ = 64880040960. Its totient is φ = 5329352448.

The previous prime is 22121322187. The next prime is 22121322221. The reversal of 22121322210 is 1222312122.

22121322210 is a `hidden beast` number, since 221 + 213 + 22 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 97924 + ... + 232016.

It is an arithmetic number, because the mean of its divisors is an integer number (506875320).

Almost surely, 2^22121322210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22121322210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32440020480).

22121322210 is an abundant number, since it is smaller than the sum of its proper divisors (42758718750).

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

22121322210 is a wasteful number, since it uses less digits than its factorization.

22121322210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134169 (or 134163 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22121322210 its reverse (1222312122), we get a palindrome (23343634332).

The spelling of 22121322210 in words is "twenty-two billion, one hundred twenty-one million, three hundred twenty-two thousand, two hundred ten".