2131202311 has 4 divisors (see below), whose sum is σ = 2435659792. Its totient is φ = 1826744832.

The previous prime is 2131202273. The next prime is 2131202321. The reversal of 2131202311 is 1132021312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2131202311 - 2⁹ = 2131201799 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 (2131202321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152228730 + ... + 152228743.

It is an arithmetic number, because the mean of its divisors is an integer number (608914948).

Almost surely, 2^2131202311 is an apocalyptic number.

2131202311 is a deficient number, since it is larger than the sum of its proper divisors (304457481).

2131202311 is an equidigital number, since it uses as much as digits as its factorization.

2131202311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304457480.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2131202311 is about 46164.9467778313. The cubic root of 2131202311 is about 1286.8903951189.

Adding to 2131202311 its reverse (1132021312), we get a palindrome (3263223623).

The spelling of 2131202311 in words is "two billion, one hundred thirty-one million, two hundred two thousand, three hundred eleven".