201100112211221 has 32 divisors (see below), whose sum is σ = 204094507161600. Its totient is φ = 198133529376640.

The previous prime is 201100112211091. The next prime is 201100112211253. The reversal of 201100112211221 is 122112211001102.

It is a cyclic number.

It is not a de Polignac number, because 201100112211221 - 2²⁶ = 201100045102357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 201100112211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201100112111221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16431084020 + ... + 16431096258.

It is an arithmetic number, because the mean of its divisors is an integer number (6377953348800).

Almost surely, 2^{201100112211221} is an apocalyptic number.

It is an amenable number.

201100112211221 is a deficient number, since it is larger than the sum of its proper divisors (2994394950379).

201100112211221 is a wasteful number, since it uses less digits than its factorization.

201100112211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14089.

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

Adding to 201100112211221 its reverse (122112211001102), we get a palindrome (323212323212323).

The spelling of 201100112211221 in words is "two hundred one trillion, one hundred billion, one hundred twelve million, two hundred eleven thousand, two hundred twenty-one".