11131021331 has 2 divisors, whose sum is σ = 11131021332. Its totient is φ = 11131021330.

The previous prime is 11131021277. The next prime is 11131021357. The reversal of 11131021331 is 13312013111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11131021331 - 2⁶ = 11131021267 is a prime.

It is a super-2 number, since 2×11131021331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11131020331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5565510665 + 5565510666.

It is an arithmetic number, because the mean of its divisors is an integer number (5565510666).

Almost surely, 2^11131021331 is an apocalyptic number.

11131021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131021331 is an equidigital number, since it uses as much as digits as its factorization.

11131021331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 11131021331 its reverse (13312013111), we get a palindrome (24443034442).

The spelling of 11131021331 in words is "eleven billion, one hundred thirty-one million, twenty-one thousand, three hundred thirty-one".