220222121121 has 24 divisors (see below), whose sum is σ = 328416308480. Its totient is φ = 142054365600.

The previous prime is 220222121101. The next prime is 220222121131. The reversal of 220222121121 is 121121222022.

It is a happy number.

It is not a de Polignac number, because 220222121121 - 2⁹ = 220222120609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220222121094 and 220222121103.

It is not an unprimeable number, because it can be changed into a prime (220222121101) 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, 1634595 + ... + 1764183.

Almost surely, 2^220222121121 is an apocalyptic number.

It is an amenable number.

220222121121 is a deficient number, since it is larger than the sum of its proper divisors (108194187359).

220222121121 is a wasteful number, since it uses less digits than its factorization.

220222121121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135717 (or 135714 counting only the distinct ones).

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

Adding to 220222121121 its reverse (121121222022), we get a palindrome (341343343143).

The spelling of 220222121121 in words is "two hundred twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred twenty-one".