1121142109 has 2 divisors, whose sum is σ = 1121142110. Its totient is φ = 1121142108.

The previous prime is 1121142091. The next prime is 1121142137. The reversal of 1121142109 is 9012411211.

Together with previous prime (1121142091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1094154084 + 26988025 = 33078^2 + 5195^2 .

It is an emirp because it is prime and its reverse (9012411211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1121142109 - 2¹³ = 1121133917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121142109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121142149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560571054 + 560571055.

It is an arithmetic number, because the mean of its divisors is an integer number (560571055).

Almost surely, 2^1121142109 is an apocalyptic number.

It is an amenable number.

1121142109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121142109 is an equidigital number, since it uses as much as digits as its factorization.

1121142109 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1121142109 is about 33483.4602303884. The cubic root of 1121142109 is about 1038.8517001064.

The spelling of 1121142109 in words is "one billion, one hundred twenty-one million, one hundred forty-two thousand, one hundred nine".