201200122011221 has 4 divisors (see below), whose sum is σ = 207690448527744. Its totient is φ = 194709795494700.

The previous prime is 201200122011191. The next prime is 201200122011263. The reversal of 201200122011221 is 122110221002102.

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 201200122011221 - 2²² = 201200117816917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201200122011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200122011121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3245163258215 + ... + 3245163258276.

It is an arithmetic number, because the mean of its divisors is an integer number (51922612131936).

Almost surely, 2^{201200122011221} is an apocalyptic number.

It is an amenable number.

201200122011221 is a deficient number, since it is larger than the sum of its proper divisors (6490326516523).

201200122011221 is an equidigital number, since it uses as much as digits as its factorization.

201200122011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6490326516522.

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

Adding to 201200122011221 its reverse (122110221002102), we get a palindrome (323310343013323).

The spelling of 201200122011221 in words is "two hundred one trillion, two hundred billion, one hundred twenty-two million, eleven thousand, two hundred twenty-one".