21231202202 has 16 divisors (see below), whose sum is σ = 36416096640. Its totient is φ = 9094149168.

The previous prime is 21231202177. The next prime is 21231202217. The reversal of 21231202202 is 20220213212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 384677 + ... + 436392.

It is an arithmetic number, because the mean of its divisors is an integer number (2276006040).

Almost surely, 2^21231202202 is an apocalyptic number.

21231202202 is a deficient number, since it is larger than the sum of its proper divisors (15184894438).

21231202202 is a wasteful number, since it uses less digits than its factorization.

21231202202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822925.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21231202202 its reverse (20220213212), we get a palindrome (41451415414).

The spelling of 21231202202 in words is "twenty-one billion, two hundred thirty-one million, two hundred two thousand, two hundred two".