12012111021947 has 2 divisors, whose sum is σ = 12012111021948. Its totient is φ = 12012111021946.

The previous prime is 12012111021943. The next prime is 12012111022003. The reversal of 12012111021947 is 74912011121021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12012111021947 - 2² = 12012111021943 is a prime.

It is a super-2 number, since 2×12012111021947² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12012111021943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006055510973 + 6006055510974.

It is an arithmetic number, because the mean of its divisors is an integer number (6006055510974).

Almost surely, 2^{12012111021947} is an apocalyptic number.

12012111021947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012111021947 is an equidigital number, since it uses as much as digits as its factorization.

12012111021947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

Adding to 12012111021947 its reverse (74912011121021), we get a palindrome (86924122142968).

The spelling of 12012111021947 in words is "twelve trillion, twelve billion, one hundred eleven million, twenty-one thousand, nine hundred forty-seven".