202121220222 has 48 divisors (see below), whose sum is σ = 455308439040. Its totient is φ = 64731301200.

The previous prime is 202121220209. The next prime is 202121220227. The reversal of 202121220222 is 222022121202.

202121220222 is a `hidden beast` number, since 202 + 1 + 21 + 220 + 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 = 202121220195 and 202121220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121220227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1225404 + ... + 1380527.

It is an arithmetic number, because the mean of its divisors is an integer number (9485592480).

Almost surely, 2^202121220222 is an apocalyptic number.

202121220222 is an abundant number, since it is smaller than the sum of its proper divisors (253187218818).

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

202121220222 is a wasteful number, since it uses less digits than its factorization.

202121220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606109 (or 2606106 counting only the distinct ones).

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

Adding to 202121220222 its reverse (222022121202), we get a palindrome (424143341424).

The spelling of 202121220222 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-two".