201221201201111 has 8 divisors (see below), whose sum is σ = 247656863016864. Its totient is φ = 159207983367840.

The previous prime is 201221201201003. The next prime is 201221201201113. The reversal of 201221201201111 is 111102102122102.

201221201201111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221201201111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201221201201111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221201201113) 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, 1105610995520 + ... + 1105610995701.

It is an arithmetic number, because the mean of its divisors is an integer number (30957107877108).

Almost surely, 2^{201221201201111} is an apocalyptic number.

201221201201111 is a deficient number, since it is larger than the sum of its proper divisors (46435661815753).

201221201201111 is a wasteful number, since it uses less digits than its factorization.

201221201201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2211221991241.

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

Adding to 201221201201111 its reverse (111102102122102), we get a palindrome (312323303323213).

The spelling of 201221201201111 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred one million, two hundred one thousand, one hundred eleven".