2131312111 has 8 divisors (see below), whose sum is σ = 2136518384. Its totient is φ = 2126113920.

The previous prime is 2131312087. The next prime is 2131312163. The reversal of 2131312111 is 1112131312.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2131312111 - 2¹⁹ = 2130787823 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 (2131312811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144321 + ... + 1146181.

It is an arithmetic number, because the mean of its divisors is an integer number (267064798).

Almost surely, 2^2131312111 is an apocalyptic number.

2131312111 is a deficient number, since it is larger than the sum of its proper divisors (5206273).

2131312111 is a wasteful number, since it uses less digits than its factorization.

2131312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041.

The product of its digits is 36, while the sum is 16.

The square root of 2131312111 is about 46166.1359764926. The cubic root of 2131312111 is about 1286.9124950291.

Adding to 2131312111 its reverse (1112131312), we get a palindrome (3243443423).

It can be divided in two parts, 2131312 and 111, that multiplied together give a palindrome (236575632).

The spelling of 2131312111 in words is "two billion, one hundred thirty-one million, three hundred twelve thousand, one hundred eleven".