2021222100222 has 80 divisors (see below), whose sum is σ = 5134128513360. Its totient is φ = 589182139008.

The previous prime is 2021222100221. The next prime is 2021222100263. The reversal of 2021222100222 is 2220012221202.

2021222100222 is a `hidden beast` number, since 20 + 212 + 2 + 210 + 0 + 222 = 666.

It is a super-2 number, since 2×2021222100222² (a number of 25 digits) contains 22 as substring.

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 = 2021222100195 and 2021222100204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021222100221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25216423 + ... + 25296450.

It is an arithmetic number, because the mean of its divisors is an integer number (64176606417).

Almost surely, 2^{2021222100222} is an apocalyptic number.

2021222100222 is an abundant number, since it is smaller than the sum of its proper divisors (3112906413138).

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

2021222100222 is a wasteful number, since it uses less digits than its factorization.

2021222100222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50512919 (or 50512910 counting only the distinct ones).

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

Adding to 2021222100222 its reverse (2220012221202), we get a palindrome (4241234321424).

The spelling of 2021222100222 in words is "two trillion, twenty-one billion, two hundred twenty-two million, one hundred thousand, two hundred twenty-two".