201211033221023 has 4 divisors (see below), whose sum is σ = 229955466538320. Its totient is φ = 172466599903728.

The previous prime is 201211033221019. The next prime is 201211033221061. The reversal of 201211033221023 is 320122330112102.

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

It is a cyclic number.

It is not a de Polignac number, because 201211033221023 - 2² = 201211033221019 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 201211033221023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201211033224023) 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, 14372216658638 + ... + 14372216658651.

It is an arithmetic number, because the mean of its divisors is an integer number (57488866634580).

Almost surely, 2^{201211033221023} is an apocalyptic number.

201211033221023 is a deficient number, since it is larger than the sum of its proper divisors (28744433317297).

201211033221023 is an equidigital number, since it uses as much as digits as its factorization.

201211033221023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28744433317296.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 201211033221023 its reverse (320122330112102), we get a palindrome (521333363333125).

The spelling of 201211033221023 in words is "two hundred one trillion, two hundred eleven billion, thirty-three million, two hundred twenty-one thousand, twenty-three".