12100019947 has 2 divisors, whose sum is σ = 12100019948. Its totient is φ = 12100019946.

The previous prime is 12100019941. The next prime is 12100020029. The reversal of 12100019947 is 74991000121.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12100019947 is a prime.

It is not a weakly prime, because it can be changed into another prime (12100019941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050009973 + 6050009974.

It is an arithmetic number, because the mean of its divisors is an integer number (6050009974).

Almost surely, 2^12100019947 is an apocalyptic number.

12100019947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100019947 is an equidigital number, since it uses as much as digits as its factorization.

12100019947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The spelling of 12100019947 in words is "twelve billion, one hundred million, nineteen thousand, nine hundred forty-seven".