12120209947 has 2 divisors, whose sum is σ = 12120209948. Its totient is φ = 12120209946.

The previous prime is 12120209911. The next prime is 12120209977. The reversal of 12120209947 is 74990202121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12120209947 - 2²⁷ = 11985992219 is a prime.

It is not a weakly prime, because it can be changed into another prime (12120209977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060104973 + 6060104974.

It is an arithmetic number, because the mean of its divisors is an integer number (6060104974).

Almost surely, 2^12120209947 is an apocalyptic number.

12120209947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12120209947 is an equidigital number, since it uses as much as digits as its factorization.

12120209947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 12120209947 in words is "twelve billion, one hundred twenty million, two hundred nine thousand, nine hundred forty-seven".