12101102009 has 2 divisors, whose sum is σ = 12101102010. Its totient is φ = 12101102008.

The previous prime is 12101101967. The next prime is 12101102089. The reversal of 12101102009 is 90020110121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10733581609 + 1367520400 = 103603^2 + 36980^2 .

It is an emirp because it is prime and its reverse (90020110121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12101102009 - 2²⁴ = 12084324793 is a prime.

It is not a weakly prime, because it can be changed into another prime (12101102089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050551004 + 6050551005.

It is an arithmetic number, because the mean of its divisors is an integer number (6050551005).

Almost surely, 2^12101102009 is an apocalyptic number.

It is an amenable number.

12101102009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101102009 is an equidigital number, since it uses as much as digits as its factorization.

12101102009 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 spelling of 12101102009 in words is "twelve billion, one hundred one million, one hundred two thousand, nine".