201222121111 has 8 divisors (see below), whose sum is σ = 219920805648. Its totient is φ = 182591064000.

The previous prime is 201222121091. The next prime is 201222121153. The reversal of 201222121111 is 111121222102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201222121111 - 2⁹ = 201222120599 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 (201222191111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16900630 + ... + 16912531.

It is an arithmetic number, because the mean of its divisors is an integer number (27490100706).

Almost surely, 2^201222121111 is an apocalyptic number.

201222121111 is a deficient number, since it is larger than the sum of its proper divisors (18698684537).

201222121111 is a wasteful number, since it uses less digits than its factorization.

201222121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33813713.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201222121111 its reverse (111121222102), we get a palindrome (312343343213).

The spelling of 201222121111 in words is "two hundred one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred eleven".