201221120111 has 8 divisors (see below), whose sum is σ = 231067315200. Its totient is φ = 173300486040.

The previous prime is 201221120099. The next prime is 201221120153. The reversal of 201221120111 is 111021122102.

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

It is not a de Polignac number, because 201221120111 - 2⁶ = 201221120047 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 (201221120011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481390031 + ... + 481390448.

It is an arithmetic number, because the mean of its divisors is an integer number (28883414400).

Almost surely, 2^201221120111 is an apocalyptic number.

201221120111 is a deficient number, since it is larger than the sum of its proper divisors (29846195089).

201221120111 is a wasteful number, since it uses less digits than its factorization.

201221120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962780509.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201221120111 its reverse (111021122102), we get a palindrome (312242242213).

The spelling of 201221120111 in words is "two hundred one billion, two hundred twenty-one million, one hundred twenty thousand, one hundred eleven".