1121142091 has 2 divisors, whose sum is σ = 1121142092. Its totient is φ = 1121142090.

The previous prime is 1121142083. The next prime is 1121142109. The reversal of 1121142091 is 1902411211.

Together with next prime (1121142109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1121142091 - 2³ = 1121142083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121140091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560571045 + 560571046.

It is an arithmetic number, because the mean of its divisors is an integer number (560571046).

Almost surely, 2^1121142091 is an apocalyptic number.

1121142091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121142091 is an equidigital number, since it uses as much as digits as its factorization.

1121142091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 1121142091 is about 33483.4599615990. The cubic root of 1121142091 is about 1038.8516945467.

The spelling of 1121142091 in words is "one billion, one hundred twenty-one million, one hundred forty-two thousand, ninety-one".