2131203311305 has 32 divisors (see below), whose sum is σ = 2841949338624. Its totient is φ = 1526029925376.

The previous prime is 2131203311287. The next prime is 2131203311311. The reversal of 2131203311305 is 5031133021312.

It is a cyclic number.

It is not a de Polignac number, because 2131203311305 - 2⁵ = 2131203311273 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 2131203311305.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2812449 + ... + 3488878.

It is an arithmetic number, because the mean of its divisors is an integer number (88810916832).

Almost surely, 2^{2131203311305} is an apocalyptic number.

It is an amenable number.

2131203311305 is a deficient number, since it is larger than the sum of its proper divisors (710746027319).

2131203311305 is a wasteful number, since it uses less digits than its factorization.

2131203311305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6301545.

The product of its (nonzero) digits is 1620, while the sum is 25.

Adding to 2131203311305 its reverse (5031133021312), we get a palindrome (7162336332617).

The spelling of 2131203311305 in words is "two trillion, one hundred thirty-one billion, two hundred three million, three hundred eleven thousand, three hundred five".