202122220220 has 96 divisors (see below), whose sum is σ = 447262373376. Its totient is φ = 76624588800.

The previous prime is 202122220211. The next prime is 202122220249. The reversal of 202122220220 is 22022221202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8800592 + ... + 8823528.

It is an arithmetic number, because the mean of its divisors is an integer number (4658983056).

Almost surely, 2^202122220220 is an apocalyptic number.

202122220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202122220220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223631186688).

202122220220 is an abundant number, since it is smaller than the sum of its proper divisors (245140153156).

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

202122220220 is a wasteful number, since it uses less digits than its factorization.

202122220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23271 (or 23269 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

Adding to 202122220220 its reverse (22022221202), we get a palindrome (224144441422).

The spelling of 202122220220 in words is "two hundred two billion, one hundred twenty-two million, two hundred twenty thousand, two hundred twenty".