21220100202 has 64 divisors (see below), whose sum is σ = 49029523200. Its totient is φ = 5997196800.

The previous prime is 21220100189. The next prime is 21220100207. The reversal of 21220100202 is 20200102212.

It is not an unprimeable number, because it can be changed into a prime (21220100207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6823824 + ... + 6826932.

It is an arithmetic number, because the mean of its divisors is an integer number (766086300).

Almost surely, 2^21220100202 is an apocalyptic number.

21220100202 is an abundant number, since it is smaller than the sum of its proper divisors (27809422998).

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

21220100202 is a wasteful number, since it uses less digits than its factorization.

21220100202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4831.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21220100202 its reverse (20200102212), we get a palindrome (41420202414).

The spelling of 21220100202 in words is "twenty-one billion, two hundred twenty million, one hundred thousand, two hundred two".