201220110001 has 16 divisors (see below), whose sum is σ = 210395808000. Its totient is φ = 192272227200.

The previous prime is 201220109989. The next prime is 201220110043. The reversal of 201220110001 is 100011022102.

It is a cyclic number.

It is not a de Polignac number, because 201220110001 - 2⁷ = 201220109873 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 201220110001.

It is not an unprimeable number, because it can be changed into a prime (201220110101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502075 + ... + 809023.

It is an arithmetic number, because the mean of its divisors is an integer number (13149738000).

Almost surely, 2^201220110001 is an apocalyptic number.

It is an amenable number.

201220110001 is a deficient number, since it is larger than the sum of its proper divisors (9175697999).

201220110001 is a wasteful number, since it uses less digits than its factorization.

201220110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307320.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201220110001 its reverse (100011022102), we get a palindrome (301231132103).

It can be divided in two parts, 2012201 and 10001, that added together give a palindrome (2022202).

The spelling of 201220110001 in words is "two hundred one billion, two hundred twenty million, one hundred ten thousand, one".