2121201322213 has 4 divisors (see below), whose sum is σ = 2136461763520. Its totient is φ = 2105940880908.

The previous prime is 2121201322211. The next prime is 2121201322217. The reversal of 2121201322213 is 3122231021212.

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 a cyclic number.

It is not a de Polignac number, because 2121201322213 - 2¹ = 2121201322211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121201322211) 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, 7630220445 + ... + 7630220722.

It is an arithmetic number, because the mean of its divisors is an integer number (534115440880).

Almost surely, 2^{2121201322213} is an apocalyptic number.

It is an amenable number.

2121201322213 is a deficient number, since it is larger than the sum of its proper divisors (15260441307).

2121201322213 is a wasteful number, since it uses less digits than its factorization.

2121201322213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15260441306.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 2121201322213 its reverse (3122231021212), we get a palindrome (5243432343425).

The spelling of 2121201322213 in words is "two trillion, one hundred twenty-one billion, two hundred one million, three hundred twenty-two thousand, two hundred thirteen".