1111091131 has 2 divisors, whose sum is σ = 1111091132. Its totient is φ = 1111091130.

The previous prime is 1111091089. The next prime is 1111091143. The reversal of 1111091131 is 1311901111.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1311901111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1111091131 - 2⁹ = 1111090619 is a prime.

It is a super-2 number, since 2×1111091131² = 2469047002773718322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1111091099 and 1111091108.

It is not a weakly prime, because it can be changed into another prime (1111091231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555545565 + 555545566.

It is an arithmetic number, because the mean of its divisors is an integer number (555545566).

Almost surely, 2^1111091131 is an apocalyptic number.

1111091131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111091131 is an equidigital number, since it uses as much as digits as its factorization.

1111091131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27, while the sum is 19.

The square root of 1111091131 is about 33333.0336303193. The cubic root of 1111091131 is about 1035.7379603290.

Adding to 1111091131 its reverse (1311901111), we get a palindrome (2422992242).

The spelling of 1111091131 in words is "one billion, one hundred eleven million, ninety-one thousand, one hundred thirty-one".