21002224202 has 8 divisors (see below), whose sum is σ = 31506244356. Its totient is φ = 10500142752.

The previous prime is 21002224169. The next prime is 21002224213. The reversal of 21002224202 is 20242220012.

It can be written as a sum of positive squares in 2 ways, for example, as 18612872041 + 2389352161 = 136429^2 + 48881^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 457283 + ... + 501110.

Almost surely, 2^21002224202 is an apocalyptic number.

21002224202 is a deficient number, since it is larger than the sum of its proper divisors (10504020154).

21002224202 is a wasteful number, since it uses less digits than its factorization.

21002224202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969352.

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

Adding to 21002224202 its reverse (20242220012), we get a palindrome (41244444214).

The spelling of 21002224202 in words is "twenty-one billion, two million, two hundred twenty-four thousand, two hundred two".