21302120200202 has 8 divisors (see below), whose sum is σ = 32732526161412. Its totient is φ = 10391278146400.

The previous prime is 21302120200187. The next prime is 21302120200279. The reversal of 21302120200202 is 20200202120312.

It can be written as a sum of positive squares in 2 ways, for example, as 21288174715921 + 13945484281 = 4613911^2 + 118091^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129890976749 + ... + 129890976912.

Almost surely, 2^{21302120200202} is an apocalyptic number.

21302120200202 is a deficient number, since it is larger than the sum of its proper divisors (11430405961210).

21302120200202 is a wasteful number, since it uses less digits than its factorization.

21302120200202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259781953704.

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

Adding to 21302120200202 its reverse (20200202120312), we get a palindrome (41502322320514).

The spelling of 21302120200202 in words is "twenty-one trillion, three hundred two billion, one hundred twenty million, two hundred thousand, two hundred two".