11134131821 has 2 divisors, whose sum is σ = 11134131822. Its totient is φ = 11134131820.

The previous prime is 11134131817. The next prime is 11134131823. The reversal of 11134131821 is 12813143111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9724129321 + 1410002500 = 98611^2 + 37550^2 .

It is a cyclic number.

It is not a de Polignac number, because 11134131821 - 2² = 11134131817 is a prime.

Together with 11134131823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11134131823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5567065910 + 5567065911.

It is an arithmetic number, because the mean of its divisors is an integer number (5567065911).

Almost surely, 2^11134131821 is an apocalyptic number.

It is an amenable number.

11134131821 is a deficient number, since it is larger than the sum of its proper divisors (1).

11134131821 is an equidigital number, since it uses as much as digits as its factorization.

11134131821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 26.

Adding to 11134131821 its reverse (12813143111), we get a palindrome (23947274932).

The spelling of 11134131821 in words is "eleven billion, one hundred thirty-four million, one hundred thirty-one thousand, eight hundred twenty-one".