11131020331 has 2 divisors, whose sum is σ = 11131020332. Its totient is φ = 11131020330.

The previous prime is 11131020311. The next prime is 11131020347. The reversal of 11131020331 is 13302013111.

It is an a-pointer prime, because the next prime (11131020347) can be obtained adding 11131020331 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131020331 is a prime.

It is a super-2 number, since 2×11131020331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11131020311) 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 as a sum of consecutive naturals, namely, 5565510165 + 5565510166.

It is an arithmetic number, because the mean of its divisors is an integer number (5565510166).

Almost surely, 2^11131020331 is an apocalyptic number.

11131020331 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131020331 is an equidigital number, since it uses as much as digits as its factorization.

11131020331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 11131020331 its reverse (13302013111), we get a palindrome (24433033442).

The spelling of 11131020331 in words is "eleven billion, one hundred thirty-one million, twenty thousand, three hundred thirty-one".