210201021221201 has 4 divisors (see below), whose sum is σ = 210201514232304. Its totient is φ = 210200528210100.

The previous prime is 210201021221189. The next prime is 210201021221227. The reversal of 210201021221201 is 102122120102012.

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 a de Polignac number, because none of the positive numbers 2^k-210201021221201 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 210201021221201.

It is not an unprimeable number, because it can be changed into a prime (210201021223201) 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, 245865455 + ... + 246718916.

It is an arithmetic number, because the mean of its divisors is an integer number (52550378558076).

Almost surely, 2^{210201021221201} is an apocalyptic number.

It is an amenable number.

210201021221201 is a deficient number, since it is larger than the sum of its proper divisors (493011103).

210201021221201 is an equidigital number, since it uses as much as digits as its factorization.

210201021221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493011102.

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

Adding to 210201021221201 its reverse (102122120102012), we get a palindrome (312323141323213).

The spelling of 210201021221201 in words is "two hundred ten trillion, two hundred one billion, twenty-one million, two hundred twenty-one thousand, two hundred one".