1210112009 has 2 divisors, whose sum is σ = 1210112010. Its totient is φ = 1210112008.

The previous prime is 1210111997. The next prime is 1210112027. The reversal of 1210112009 is 9002110121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 981255625 + 228856384 = 31325^2 + 15128^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210112009 - 2¹⁶ = 1210046473 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1210112809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605056004 + 605056005.

It is an arithmetic number, because the mean of its divisors is an integer number (605056005).

Almost surely, 2^1210112009 is an apocalyptic number.

It is an amenable number.

1210112009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210112009 is an equidigital number, since it uses as much as digits as its factorization.

1210112009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 1210112009 is about 34786.6642407690. The cubic root of 1210112009 is about 1065.6351164796.

The spelling of 1210112009 in words is "one billion, two hundred ten million, one hundred twelve thousand, nine".