1131042091 has 2 divisors, whose sum is σ = 1131042092. Its totient is φ = 1131042090.

The previous prime is 1131042083. The next prime is 1131042149. The reversal of 1131042091 is 1902401311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131042091 - 2³ = 1131042083 is a prime.

It is a super-2 number, since 2×1131042091² = 2558512423227304562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1131042041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565521045 + 565521046.

It is an arithmetic number, because the mean of its divisors is an integer number (565521046).

Almost surely, 2^1131042091 is an apocalyptic number.

1131042091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131042091 is an equidigital number, since it uses as much as digits as its factorization.

1131042091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1131042091 is about 33630.9692248083. The cubic root of 1131042091 is about 1041.9005222948.

The spelling of 1131042091 in words is "one billion, one hundred thirty-one million, forty-two thousand, ninety-one".