222122012121220 has 12 divisors (see below), whose sum is σ = 466456225454604. Its totient is φ = 88848804848480.

The previous prime is 222122012121179. The next prime is 222122012121257. The reversal of 222122012121220 is 22121210221222.

It can be written as a sum of positive squares in 2 ways, for example, as 32865202221124 + 189256809900096 = 5732818^2 + 13757064^2 .

It is a junction number, because it is equal to n+sod(n) for n = 222122012121191 and 222122012121200.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5553050303011 + ... + 5553050303050.

It is an arithmetic number, because the mean of its divisors is an integer number (38871352121217).

Almost surely, 2^{222122012121220} is an apocalyptic number.

222122012121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222122012121220 is an abundant number, since it is smaller than the sum of its proper divisors (244334213333384).

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

222122012121220 is a wasteful number, since it uses less digits than its factorization.

222122012121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11106100606070 (or 11106100606068 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222122012121220 its reverse (22121210221222), we get a palindrome (244243222342442).

The spelling of 222122012121220 in words is "two hundred twenty-two trillion, one hundred twenty-two billion, twelve million, one hundred twenty-one thousand, two hundred twenty".