21241222202 has 32 divisors (see below), whose sum is σ = 33428149200. Its totient is φ = 10109575168.

The previous prime is 21241222187. The next prime is 21241222207. The reversal of 21241222202 is 20222214212.

It can be written as a sum of positive squares in 8 ways, for example, as 8926659361 + 12314562841 = 94481^2 + 110971^2 .

It is not an unprimeable number, because it can be changed into a prime (21241222207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1816358 + ... + 1828014.

Almost surely, 2^21241222202 is an apocalyptic number.

21241222202 is a deficient number, since it is larger than the sum of its proper divisors (12186926998).

21241222202 is a wasteful number, since it uses less digits than its factorization.

21241222202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12130.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21241222202 its reverse (20222214212), we get a palindrome (41463436414).

The spelling of 21241222202 in words is "twenty-one billion, two hundred forty-one million, two hundred twenty-two thousand, two hundred two".