2131203313321 has 4 divisors (see below), whose sum is σ = 2142977917444. Its totient is φ = 2119428709200.

The previous prime is 2131203313279. The next prime is 2131203313361. The reversal of 2131203313321 is 1233133021312.

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 1115693637696 + 1015509675625 = 1056264^2 + 1007725^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131203313321 - 2¹¹ = 2131203311273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131203313361) 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, 5887301790 + ... + 5887302151.

It is an arithmetic number, because the mean of its divisors is an integer number (535744479361).

Almost surely, 2^{2131203313321} is an apocalyptic number.

It is an amenable number.

2131203313321 is a deficient number, since it is larger than the sum of its proper divisors (11774604123).

2131203313321 is a wasteful number, since it uses less digits than its factorization.

2131203313321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11774604122.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 2131203313321 its reverse (1233133021312), we get a palindrome (3364336334633).

The spelling of 2131203313321 in words is "two trillion, one hundred thirty-one billion, two hundred three million, three hundred thirteen thousand, three hundred twenty-one".