20202110210221 has 16 divisors (see below), whose sum is σ = 20328673673088. Its totient is φ = 20075801054400.

The previous prime is 20202110210207. The next prime is 20202110210257. The reversal of 20202110210221 is 12201201120202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20202110210221 - 2²¹ = 20202108113069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20202110210195 and 20202110210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202110210521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 798395056 + ... + 798420358.

It is an arithmetic number, because the mean of its divisors is an integer number (1270542104568).

Almost surely, 2^{20202110210221} is an apocalyptic number.

It is an amenable number.

20202110210221 is a deficient number, since it is larger than the sum of its proper divisors (126563462867).

20202110210221 is a wasteful number, since it uses less digits than its factorization.

20202110210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30132.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20202110210221 its reverse (12201201120202), we get a palindrome (32403311330423).

The spelling of 20202110210221 in words is "twenty trillion, two hundred two billion, one hundred ten million, two hundred ten thousand, two hundred twenty-one".