21200210010202 has 4 divisors (see below), whose sum is σ = 31800315015306. Its totient is φ = 10600105005100.

The previous prime is 21200210010179. The next prime is 21200210010211. The reversal of 21200210010202 is 20201001200212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19706239167241 + 1493970842961 = 4439171^2 + 1222281^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300052502549 + ... + 5300052502552.

Almost surely, 2^{21200210010202} is an apocalyptic number.

21200210010202 is a deficient number, since it is larger than the sum of its proper divisors (10600105005104).

21200210010202 is a wasteful number, since it uses less digits than its factorization.

21200210010202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600105005103.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21200210010202 its reverse (20201001200212), we get a palindrome (41401211210414).

The spelling of 21200210010202 in words is "twenty-one trillion, two hundred billion, two hundred ten million, ten thousand, two hundred two".