12101111947 has 2 divisors, whose sum is σ = 12101111948. Its totient is φ = 12101111946.

The previous prime is 12101111929. The next prime is 12101111963. The reversal of 12101111947 is 74911110121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101111947 is a prime.

It is a super-2 number, since 2×12101111947² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12101111927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050555973 + 6050555974.

It is an arithmetic number, because the mean of its divisors is an integer number (6050555974).

Almost surely, 2^12101111947 is an apocalyptic number.

12101111947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101111947 is an equidigital number, since it uses as much as digits as its factorization.

12101111947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 28.

The spelling of 12101111947 in words is "twelve billion, one hundred one million, one hundred eleven thousand, nine hundred forty-seven".