220220222121 has 48 divisors (see below), whose sum is σ = 347378113600. Its totient is φ = 137856162816.

The previous prime is 220220222111. The next prime is 220220222137. The reversal of 220220222121 is 121222022022.

220220222121 is a `hidden beast` number, since 220 + 2 + 202 + 221 + 21 = 666.

220220222121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 220220222121 - 2⁷ = 220220221993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220220222094 and 220220222103.

It is not an unprimeable number, because it can be changed into a prime (220220222111) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3346110 + ... + 3411288.

Almost surely, 2^220220222121 is an apocalyptic number.

It is an amenable number.

220220222121 is a deficient number, since it is larger than the sum of its proper divisors (127157891479).

220220222121 is a wasteful number, since it uses less digits than its factorization.

220220222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65655 (or 65632 counting only the distinct ones).

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

Adding to 220220222121 its reverse (121222022022), we get a palindrome (341442244143).

The spelling of 220220222121 in words is "two hundred twenty billion, two hundred twenty million, two hundred twenty-two thousand, one hundred twenty-one".