2131323211 has 4 divisors (see below), whose sum is σ = 2132508424. Its totient is φ = 2130138000.

The previous prime is 2131323209. The next prime is 2131323217. The reversal of 2131323211 is 1123231312.

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 2131323211 - 2¹ = 2131323209 is a prime.

It is a super-3 number, since 3×2131323211³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131323217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 589905 + ... + 593506.

It is an arithmetic number, because the mean of its divisors is an integer number (533127106).

Almost surely, 2^2131323211 is an apocalyptic number.

2131323211 is a deficient number, since it is larger than the sum of its proper divisors (1185213).

2131323211 is a wasteful number, since it uses less digits than its factorization.

2131323211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185212.

The product of its digits is 216, while the sum is 19.

The square root of 2131323211 is about 46166.2561943244. The cubic root of 2131323211 is about 1286.9147291308.

Adding to 2131323211 its reverse (1123231312), we get a palindrome (3254554523).

The spelling of 2131323211 in words is "two billion, one hundred thirty-one million, three hundred twenty-three thousand, two hundred eleven".