201221211211113 has 4 divisors (see below), whose sum is σ = 268294948281488. Its totient is φ = 134147474140740.

The previous prime is 201221211211061. The next prime is 201221211211127. The reversal of 201221211211113 is 311112112122102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 201221211211113 - 2²¹ = 201221209113961 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 201221211211113.

It is not an unprimeable number, because it can be changed into a prime (201221211211613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33536868535183 + ... + 33536868535188.

It is an arithmetic number, because the mean of its divisors is an integer number (67073737070372).

Almost surely, 2^{201221211211113} is an apocalyptic number.

It is an amenable number.

201221211211113 is a deficient number, since it is larger than the sum of its proper divisors (67073737070375).

201221211211113 is an equidigital number, since it uses as much as digits as its factorization.

201221211211113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67073737070374.

The product of its (nonzero) digits is 96, while the sum is 21.

Adding to 201221211211113 its reverse (311112112122102), we get a palindrome (512333323333215).

The spelling of 201221211211113 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, one hundred thirteen".