22211211204 has 480 divisors, whose sum is σ = 77712588800. Its totient is φ = 5366373120.

The previous prime is 22211211203. The next prime is 22211211227. The reversal of 22211211204 is 40211211222.

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

It is not an unprimeable number, because it can be changed into a prime (22211211203) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 17365437 + ... + 17366715.

Almost surely, 2^22211211204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22211211204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38856294400).

22211211204 is an abundant number, since it is smaller than the sum of its proper divisors (55501377596).

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

22211211204 is a wasteful number, since it uses less digits than its factorization.

22211211204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22211211204 its sum of digits (18), we get a palindrome (22211211222).

Adding to 22211211204 its reverse (40211211222), we get a palindrome (62422422426).

The spelling of 22211211204 in words is "twenty-two billion, two hundred eleven million, two hundred eleven thousand, two hundred four".