2131203311331 has 16 divisors (see below), whose sum is σ = 2852416493568. Its totient is φ = 1415397369600.

The previous prime is 2131203311323. The next prime is 2131203311333. The reversal of 2131203311331 is 1331133021312.

It is not a de Polignac number, because 2131203311331 - 2³ = 2131203311323 is a prime.

It is a super-2 number, since 2×2131203311331² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2131203311333) 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 15 ways as a sum of consecutive naturals, for example, 7177171 + ... + 7468211.

It is an arithmetic number, because the mean of its divisors is an integer number (178276030848).

Almost surely, 2^{2131203311331} is an apocalyptic number.

2131203311331 is a deficient number, since it is larger than the sum of its proper divisors (721213182237).

2131203311331 is a wasteful number, since it uses less digits than its factorization.

2131203311331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300322.

The product of its (nonzero) digits is 972, while the sum is 24.

Adding to 2131203311331 its reverse (1331133021312), we get a palindrome (3462336332643).

The spelling of 2131203311331 in words is "two trillion, one hundred thirty-one billion, two hundred three million, three hundred eleven thousand, three hundred thirty-one".