201221030111 has 8 divisors (see below), whose sum is σ = 217590701760. Its totient is φ = 185355040768.

The previous prime is 201221030093. The next prime is 201221030137. The reversal of 201221030111 is 111030122102.

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-201221030111 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 (201221030011) 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, 125919746 + ... + 125921343.

It is an arithmetic number, because the mean of its divisors is an integer number (27198837720).

Almost surely, 2^201221030111 is an apocalyptic number.

201221030111 is a deficient number, since it is larger than the sum of its proper divisors (16369671649).

201221030111 is a wasteful number, since it uses less digits than its factorization.

201221030111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251841153.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 201221030111 its reverse (111030122102), we get a palindrome (312251152213).

The spelling of 201221030111 in words is "two hundred one billion, two hundred twenty-one million, thirty thousand, one hundred eleven".