202121222200 has 48 divisors (see below), whose sum is σ = 470462053680. Its totient is φ = 80757269760.

The previous prime is 202121222179. The next prime is 202121222207. The reversal of 202121222200 is 2222121202.

202121222200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202121222207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 392277 + ... + 747076.

It is an arithmetic number, because the mean of its divisors is an integer number (9801292785).

Almost surely, 2^202121222200 is an apocalyptic number.

202121222200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121222200 is an abundant number, since it is smaller than the sum of its proper divisors (268340831480).

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

202121222200 is a wasteful number, since it uses less digits than its factorization.

202121222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1140256 (or 1140247 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202121222200 its reverse (2222121202), we get a palindrome (204343343402).

The spelling of 202121222200 in words is "two hundred two billion, one hundred twenty-one million, two hundred twenty-two thousand, two hundred".