22400121222 has 48 divisors (see below), whose sum is σ = 51474035808. Its totient is φ = 7024976640.

The previous prime is 22400121221. The next prime is 22400121229. The reversal of 22400121222 is 22212100422.

22400121222 is a `hidden beast` number, since 22 + 400 + 1 + 21 + 222 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 22400121195 and 22400121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22400121221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 418243 + ... + 468750.

It is an arithmetic number, because the mean of its divisors is an integer number (1072375746).

Almost surely, 2^22400121222 is an apocalyptic number.

22400121222 is an abundant number, since it is smaller than the sum of its proper divisors (29073914586).

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

22400121222 is a wasteful number, since it uses less digits than its factorization.

22400121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887085 (or 887082 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 22400121222 its reverse (22212100422), we get a palindrome (44612221644).

The spelling of 22400121222 in words is "twenty-two billion, four hundred million, one hundred twenty-one thousand, two hundred twenty-two".