22221120222210 has 128 divisors (see below), whose sum is σ = 65681570304000. Its totient is φ = 4685283622656.

The previous prime is 22221120222199. The next prime is 22221120222271. The reversal of 22221120222210 is 1222202112222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1377259 + ... + 6807281.

It is an arithmetic number, because the mean of its divisors is an integer number (513137268000).

Almost surely, 2^{22221120222210} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221120222210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32840785152000).

22221120222210 is an abundant number, since it is smaller than the sum of its proper divisors (43460450081790).

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

22221120222210 is a wasteful number, since it uses less digits than its factorization.

22221120222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5431552.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 22221120222210 its reverse (1222202112222), we get a palindrome (23443322334432).

The spelling of 22221120222210 in words is "twenty-two trillion, two hundred twenty-one billion, one hundred twenty million, two hundred twenty-two thousand, two hundred ten".