1209999999907 has 2 divisors, whose sum is σ = 1209999999908. Its totient is φ = 1209999999906.

The previous prime is 1209999999893. The next prime is 1210000000021. The reversal of 1209999999907 is 7099999999021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1209999999907 - 2⁷ = 1209999999779 is a prime.

It is not a weakly prime, because it can be changed into another prime (1209999990907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 604999999953 + 604999999954.

It is an arithmetic number, because the mean of its divisors is an integer number (604999999954).

Almost surely, 2^{1209999999907} is an apocalyptic number.

1209999999907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1209999999907 is an equidigital number, since it uses as much as digits as its factorization.

1209999999907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 602654094, while the sum is 82.

The spelling of 1209999999907 in words is "one trillion, two hundred nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred seven".