202020201210021 has 8 divisors (see below), whose sum is σ = 269393650425120. Its totient is φ = 134663443067472.

The previous prime is 202020201209969. The next prime is 202020201210029. The reversal of 202020201210021 is 120012102020202.

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

It is not a de Polignac number, because 202020201210021 - 2⁹ = 202020201209509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020201210029) 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, 4172739895 + ... + 4172788308.

It is an arithmetic number, because the mean of its divisors is an integer number (33674206303140).

Almost surely, 2^{202020201210021} is an apocalyptic number.

It is an amenable number.

202020201210021 is a deficient number, since it is larger than the sum of its proper divisors (67373449215099).

202020201210021 is an equidigital number, since it uses as much as digits as its factorization.

202020201210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8345536275.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202020201210021 its reverse (120012102020202), we get a palindrome (322032303230223).

The spelling of 202020201210021 in words is "two hundred two trillion, twenty billion, two hundred one million, two hundred ten thousand, twenty-one".