202020201210221 has 8 divisors (see below), whose sum is σ = 212932282084800. Its totient is φ = 191136064206240.

The previous prime is 202020201210199. The next prime is 202020201210239. The reversal of 202020201210221 is 122012102020202.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-202020201210221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 202020201210221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020201210721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6985952801 + ... + 6985981718.

It is an arithmetic number, because the mean of its divisors is an integer number (26616535260600).

Almost surely, 2^{202020201210221} is an apocalyptic number.

It is an amenable number.

202020201210221 is a deficient number, since it is larger than the sum of its proper divisors (10912080874579).

202020201210221 is a wasteful number, since it uses less digits than its factorization.

202020201210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13971935299.

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

Adding to 202020201210221 its reverse (122012102020202), we get a palindrome (324032303230423).

The spelling of 202020201210221 in words is "two hundred two trillion, twenty billion, two hundred one million, two hundred ten thousand, two hundred twenty-one".