201200111222221 has 4 divisors (see below), whose sum is σ = 202404902307552. Its totient is φ = 199995320136892.

The previous prime is 201200111222197. The next prime is 201200111222249. The reversal of 201200111222221 is 122222111002102.

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 201200111222221 - 2⁵ = 201200111222189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201200111222321) 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, 602395542415 + ... + 602395542748.

It is an arithmetic number, because the mean of its divisors is an integer number (50601225576888).

Almost surely, 2^{201200111222221} is an apocalyptic number.

It is an amenable number.

201200111222221 is a deficient number, since it is larger than the sum of its proper divisors (1204791085331).

201200111222221 is a wasteful number, since it uses less digits than its factorization.

201200111222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204791085330.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201200111222221 its reverse (122222111002102), we get a palindrome (323422222224323).

The spelling of 201200111222221 in words is "two hundred one trillion, two hundred billion, one hundred eleven million, two hundred twenty-two thousand, two hundred twenty-one".