1131120409 has 2 divisors, whose sum is σ = 1131120410. Its totient is φ = 1131120408.

The previous prime is 1131120337. The next prime is 1131120439. The reversal of 1131120409 is 9040211311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 566582809 + 564537600 = 23803^2 + 23760^2 .

It is an emirp because it is prime and its reverse (9040211311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1131120409 - 2¹⁵ = 1131087641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1131120409.

It is not a weakly prime, because it can be changed into another prime (1131120439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565560204 + 565560205.

It is an arithmetic number, because the mean of its divisors is an integer number (565560205).

Almost surely, 2^1131120409 is an apocalyptic number.

It is an amenable number.

1131120409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131120409 is an equidigital number, since it uses as much as digits as its factorization.

1131120409 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 1131120409 is about 33632.1335778746. The cubic root of 1131120409 is about 1041.9245702303.

The spelling of 1131120409 in words is "one billion, one hundred thirty-one million, one hundred twenty thousand, four hundred nine".