201221030100133 has 4 divisors (see below), whose sum is σ = 201907791295308. Its totient is φ = 200534268904960.

The previous prime is 201221030100131. The next prime is 201221030100187. The reversal of 201221030100133 is 331001030122102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 195884712957924 + 5336317142209 = 13995882^2 + 2310047^2 .

It is a cyclic number.

It is not a de Polignac number, because 201221030100133 - 2¹ = 201221030100131 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 201221030100133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221030100131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 343380597148 + ... + 343380597733.

It is an arithmetic number, because the mean of its divisors is an integer number (50476947823827).

Almost surely, 2^{201221030100133} is an apocalyptic number.

It is an amenable number.

201221030100133 is a deficient number, since it is larger than the sum of its proper divisors (686761195175).

201221030100133 is an equidigital number, since it uses as much as digits as its factorization.

201221030100133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686761195174.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201221030100133 its reverse (331001030122102), we get a palindrome (532222060222235).

The spelling of 201221030100133 in words is "two hundred one trillion, two hundred twenty-one billion, thirty million, one hundred thousand, one hundred thirty-three".