1151212009 has 2 divisors, whose sum is σ = 1151212010. Its totient is φ = 1151212008.

The previous prime is 1151212003. The next prime is 1151212057. The reversal of 1151212009 is 9002121511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1088802009 + 62410000 = 32997^2 + 7900^2 .

It is a cyclic number.

It is not a de Polignac number, because 1151212009 - 2²⁹ = 614341097 is a prime.

It is not a weakly prime, because it can be changed into another prime (1151212003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 575606004 + 575606005.

It is an arithmetic number, because the mean of its divisors is an integer number (575606005).

Almost surely, 2^1151212009 is an apocalyptic number.

It is an amenable number.

1151212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1151212009 is an equidigital number, since it uses as much as digits as its factorization.

1151212009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 1151212009 is about 33929.5153074723. The cubic root of 1151212009 is about 1048.0574845733.

The spelling of 1151212009 in words is "one billion, one hundred fifty-one million, two hundred twelve thousand, nine".