11211131005 has 4 divisors (see below), whose sum is σ = 13453357212. Its totient is φ = 8968904800.

The previous prime is 11211131003. The next prime is 11211131021. The reversal of 11211131005 is 50013111211.

It is a happy number.

11211131005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4513018041 + 6698112964 = 67179^2 + 81842^2 .

It is not a de Polignac number, because 11211131005 - 2¹ = 11211131003 is a prime.

It is a super-2 number, since 2×11211131005² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11211131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211131003) 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, 1121113096 + ... + 1121113105.

It is an arithmetic number, because the mean of its divisors is an integer number (3363339303).

Almost surely, 2^11211131005 is an apocalyptic number.

It is an amenable number.

11211131005 is a deficient number, since it is larger than the sum of its proper divisors (2242226207).

11211131005 is an equidigital number, since it uses as much as digits as its factorization.

11211131005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2242226206.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 11211131005 its reverse (50013111211), we get a palindrome (61224242216).

The spelling of 11211131005 in words is "eleven billion, two hundred eleven million, one hundred thirty-one thousand, five".