210021220102201 has 4 divisors (see below), whose sum is σ = 210042923245092. Its totient is φ = 209999516959312.

The previous prime is 210021220102171. The next prime is 210021220102207. The reversal of 210021220102201 is 102201022120012.

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 2 ways, for example, as 95545151078400 + 114476069023801 = 9774720^2 + 10699349^2 .

It is a cyclic number.

It is not a de Polignac number, because 210021220102201 - 2⁹ = 210021220101689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210021220102207) 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, 10851556930 + ... + 10851576283.

It is an arithmetic number, because the mean of its divisors is an integer number (52510730811273).

Almost surely, 2^{210021220102201} is an apocalyptic number.

It is an amenable number.

210021220102201 is a deficient number, since it is larger than the sum of its proper divisors (21703142891).

210021220102201 is an equidigital number, since it uses as much as digits as its factorization.

210021220102201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21703142890.

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

Adding to 210021220102201 its reverse (102201022120012), we get a palindrome (312222242222213).

The spelling of 210021220102201 in words is "two hundred ten trillion, twenty-one billion, two hundred twenty million, one hundred two thousand, two hundred one".