202020021200221 has 4 divisors (see below), whose sum is σ = 230880024228832. Its totient is φ = 173160018171612.

The previous prime is 202020021200203. The next prime is 202020021200227. The reversal of 202020021200221 is 122002120020202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 202020021200221 - 2⁹ = 202020021199709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202020021200195 and 202020021200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020021200227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14430001514295 + ... + 14430001514308.

It is an arithmetic number, because the mean of its divisors is an integer number (57720006057208).

Almost surely, 2^{202020021200221} is an apocalyptic number.

It is an amenable number.

202020021200221 is a deficient number, since it is larger than the sum of its proper divisors (28860003028611).

202020021200221 is an equidigital number, since it uses as much as digits as its factorization.

202020021200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28860003028610.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202020021200221 its reverse (122002120020202), we get a palindrome (324022141220423).

The spelling of 202020021200221 in words is "two hundred two trillion, twenty billion, twenty-one million, two hundred thousand, two hundred twenty-one".