21200422202 has 8 divisors (see below), whose sum is σ = 31814508756. Its totient is φ = 10595585952.

The previous prime is 21200422193. The next prime is 21200422207. The reversal of 21200422202 is 20222400212.

It can be written as a sum of positive squares in 2 ways, for example, as 21042693721 + 157728481 = 145061^2 + 12559^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21200422207) 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 3 ways as a sum of consecutive naturals, for example, 2306843 + ... + 2316014.

Almost surely, 2^21200422202 is an apocalyptic number.

21200422202 is a deficient number, since it is larger than the sum of its proper divisors (10614086554).

21200422202 is a wasteful number, since it uses less digits than its factorization.

21200422202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625152.

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

Adding to 21200422202 its reverse (20222400212), we get a palindrome (41422822414).

The spelling of 21200422202 in words is "twenty-one billion, two hundred million, four hundred twenty-two thousand, two hundred two".