210101221022201 has 4 divisors (see below), whose sum is σ = 210111168546804. Its totient is φ = 210091273497600.

The previous prime is 210101221022153. The next prime is 210101221022257. The reversal of 210101221022201 is 102220122101012.

210101221022201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 139505012378176 + 70596208644025 = 11811224^2 + 8402155^2 .

It is a cyclic number.

It is not a de Polignac number, because 210101221022201 - 2³⁰ = 210100147280377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 210101221022201.

It is not an unprimeable number, because it can be changed into a prime (210101221022281) 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, 4973730620 + ... + 4973772861.

It is an arithmetic number, because the mean of its divisors is an integer number (52527792136701).

Almost surely, 2^{210101221022201} is an apocalyptic number.

It is an amenable number.

210101221022201 is a deficient number, since it is larger than the sum of its proper divisors (9947524603).

210101221022201 is an equidigital number, since it uses as much as digits as its factorization.

210101221022201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947524602.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 210101221022201 its reverse (102220122101012), we get a palindrome (312321343123213).

The spelling of 210101221022201 in words is "two hundred ten trillion, one hundred one billion, two hundred twenty-one million, twenty-two thousand, two hundred one".