20222121222 has 96 divisors (see below), whose sum is σ = 45276641280. Its totient is φ = 6520737600.

The previous prime is 20222121217. The next prime is 20222121223. The reversal of 20222121222 is 22212122202.

20222121222 is a `hidden beast` number, since 202 + 221 + 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 = 20222121195 and 20222121204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222121223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14792383 + ... + 14793749.

It is an arithmetic number, because the mean of its divisors is an integer number (471631680).

Almost surely, 2^20222121222 is an apocalyptic number.

20222121222 is an abundant number, since it is smaller than the sum of its proper divisors (25054520058).

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

20222121222 is a wasteful number, since it uses less digits than its factorization.

20222121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658 (or 1655 counting only the distinct ones).

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

Adding to 20222121222 its reverse (22212122202), we get a palindrome (42434243424).

The spelling of 20222121222 in words is "twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred twenty-two".