2021221200222 has 96 divisors (see below), whose sum is σ = 5148872194752. Its totient is φ = 560935590912.

The previous prime is 2021221200197. The next prime is 2021221200241. The reversal of 2021221200222 is 2220021221202.

2021221200222 is a `hidden beast` number, since 2 + 0 + 21 + 221 + 200 + 222 = 666.

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 = 2021221200195 and 2021221200204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2399008 + ... + 3130124.

It is an arithmetic number, because the mean of its divisors is an integer number (53634085362).

Almost surely, 2^{2021221200222} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2021221200222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2574436097376).

2021221200222 is an abundant number, since it is smaller than the sum of its proper divisors (3127650994530).

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

2021221200222 is a wasteful number, since it uses less digits than its factorization.

2021221200222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731762 (or 731759 counting only the distinct ones).

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

Adding to 2021221200222 its reverse (2220021221202), we get a palindrome (4241242421424).

The spelling of 2021221200222 in words is "two trillion, twenty-one billion, two hundred twenty-one million, two hundred thousand, two hundred twenty-two".