201213331211021 has 16 divisors (see below), whose sum is σ = 210512006369280. Its totient is φ = 191960787997440.

The previous prime is 201213331211003. The next prime is 201213331211051. The reversal of 201213331211021 is 120112133312102.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-201213331211021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201213331211051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28941620 + ... + 35214258.

It is an arithmetic number, because the mean of its divisors is an integer number (13157000398080).

Almost surely, 2^{201213331211021} is an apocalyptic number.

It is an amenable number.

201213331211021 is a deficient number, since it is larger than the sum of its proper divisors (9298675158259).

201213331211021 is a wasteful number, since it uses less digits than its factorization.

201213331211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6276316.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 201213331211021 its reverse (120112133312102), we get a palindrome (321325464523123).

The spelling of 201213331211021 in words is "two hundred one trillion, two hundred thirteen billion, three hundred thirty-one million, two hundred eleven thousand, twenty-one".