11312012443 has 4 divisors (see below), whose sum is σ = 11350620288. Its totient is φ = 11273404600.

The previous prime is 11312012431. The next prime is 11312012461. The reversal of 11312012443 is 34421021311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11312012443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11312012473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19303483 + ... + 19304068.

It is an arithmetic number, because the mean of its divisors is an integer number (2837655072).

Almost surely, 2^11312012443 is an apocalyptic number.

11312012443 is a deficient number, since it is larger than the sum of its proper divisors (38607845).

11312012443 is an equidigital number, since it uses as much as digits as its factorization.

11312012443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38607844.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 11312012443 its reverse (34421021311), we get a palindrome (45733033754).

The spelling of 11312012443 in words is "eleven billion, three hundred twelve million, twelve thousand, four hundred forty-three".