11131330421 has 2 divisors, whose sum is σ = 11131330422. Its totient is φ = 11131330420.

The previous prime is 11131330411. The next prime is 11131330423. The reversal of 11131330421 is 12403313111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6393761521 + 4737568900 = 79961^2 + 68830^2 .

It is a cyclic number.

It is not a de Polignac number, because 11131330421 - 2¹⁰ = 11131329397 is a prime.

It is a Sophie Germain prime.

Together with 11131330423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11131330393 and 11131330402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11131330423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565665210 + 5565665211.

It is an arithmetic number, because the mean of its divisors is an integer number (5565665211).

Almost surely, 2^11131330421 is an apocalyptic number.

It is an amenable number.

11131330421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131330421 is an equidigital number, since it uses as much as digits as its factorization.

11131330421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 11131330421 its reverse (12403313111), we get a palindrome (23534643532).

The spelling of 11131330421 in words is "eleven billion, one hundred thirty-one million, three hundred thirty thousand, four hundred twenty-one".