20102212102202 has 4 divisors (see below), whose sum is σ = 30153318153306. Its totient is φ = 10051106051100.

The previous prime is 20102212102177. The next prime is 20102212102207. The reversal of 20102212102202 is 20220121220102.

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., 20054893236361 + 47318865841 = 4478269^2 + 217529^2 .

It is not an unprimeable number, because it can be changed into a prime (20102212102207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025553025549 + ... + 5025553025552.

Almost surely, 2^{20102212102202} is an apocalyptic number.

20102212102202 is a deficient number, since it is larger than the sum of its proper divisors (10051106051104).

20102212102202 is a wasteful number, since it uses less digits than its factorization.

20102212102202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10051106051103.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20102212102202 its reverse (20220121220102), we get a palindrome (40322333322304).

The spelling of 20102212102202 in words is "twenty trillion, one hundred two billion, two hundred twelve million, one hundred two thousand, two hundred two".