2011112431 has 4 divisors (see below), whose sum is σ = 2011243264. Its totient is φ = 2010981600.

The previous prime is 2011112423. The next prime is 2011112447. The reversal of 2011112431 is 1342111102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1342111102 = 2 ⋅671055551.

It is a cyclic number.

It is not a de Polignac number, because 2011112431 - 2³ = 2011112423 is a prime.

It is a super-2 number, since 2×2011112431² = 8089146420245459522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011112491) 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 3 ways as a sum of consecutive naturals, for example, 38730 + ... + 74311.

It is an arithmetic number, because the mean of its divisors is an integer number (502810816).

Almost surely, 2^2011112431 is an apocalyptic number.

2011112431 is a deficient number, since it is larger than the sum of its proper divisors (130833).

2011112431 is a wasteful number, since it uses less digits than its factorization.

2011112431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130832.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 2011112431 is about 44845.4282062286. The cubic root of 2011112431 is about 1262.2502057312.

Adding to 2011112431 its reverse (1342111102), we get a palindrome (3353223533).

The spelling of 2011112431 in words is "two billion, eleven million, one hundred twelve thousand, four hundred thirty-one".