201111122010221 has 32 divisors (see below), whose sum is σ = 209599790400000. Its totient is φ = 192806116388928.

The previous prime is 201111122010137. The next prime is 201111122010229. The reversal of 201111122010221 is 122010221111102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201111122010221 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 201111122010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201111122010229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18277838906 + ... + 18277849908.

It is an arithmetic number, because the mean of its divisors is an integer number (6549993450000).

Almost surely, 2^{201111122010221} is an apocalyptic number.

It is an amenable number.

201111122010221 is a deficient number, since it is larger than the sum of its proper divisors (8488668389779).

201111122010221 is a wasteful number, since it uses less digits than its factorization.

201111122010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21593.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201111122010221 its reverse (122010221111102), we get a palindrome (323121343121323).

The spelling of 201111122010221 in words is "two hundred one trillion, one hundred eleven billion, one hundred twenty-two million, ten thousand, two hundred twenty-one".