2131112011 has 4 divisors (see below), whose sum is σ = 2435556592. Its totient is φ = 1826667432.

The previous prime is 2131111987. The next prime is 2131112021. The reversal of 2131112011 is 1102111312.

It is a happy number.

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 2131112011 - 2¹¹ = 2131109963 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131111982 and 2131112000.

It is not an unprimeable number, because it can be changed into a prime (2131112021) 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, 152222280 + ... + 152222293.

It is an arithmetic number, because the mean of its divisors is an integer number (608889148).

Almost surely, 2^2131112011 is an apocalyptic number.

2131112011 is a deficient number, since it is larger than the sum of its proper divisors (304444581).

2131112011 is an equidigital number, since it uses as much as digits as its factorization.

2131112011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304444580.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 2131112011 is about 46163.9687526972. The cubic root of 2131112011 is about 1286.8722194874.

Adding to 2131112011 its reverse (1102111312), we get a palindrome (3233223323).

The spelling of 2131112011 in words is "two billion, one hundred thirty-one million, one hundred twelve thousand, eleven".