220222112121 has 32 divisors (see below), whose sum is σ = 355940745600. Its totient is φ = 133458114240.

The previous prime is 220222112111. The next prime is 220222112161. The reversal of 220222112121 is 121211222022.

It is a happy number.

220222112121 is a `hidden beast` number, since 220 + 22 + 211 + 212 + 1 = 666.

It is not a de Polignac number, because 220222112121 - 2¹⁵ = 220222079353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220222112094 and 220222112103.

It is not an unprimeable number, because it can be changed into a prime (220222112111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7466415 + ... + 7495851.

It is an arithmetic number, because the mean of its divisors is an integer number (11123148300).

Almost surely, 2^220222112121 is an apocalyptic number.

It is an amenable number.

220222112121 is a deficient number, since it is larger than the sum of its proper divisors (135718633479).

220222112121 is a wasteful number, since it uses less digits than its factorization.

220222112121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54646 (or 54640 counting only the distinct ones).

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

Adding to 220222112121 its reverse (121211222022), we get a palindrome (341433334143).

The spelling of 220222112121 in words is "two hundred twenty billion, two hundred twenty-two million, one hundred twelve thousand, one hundred twenty-one".