12122121021947 has 2 divisors, whose sum is σ = 12122121021948. Its totient is φ = 12122121021946.

The previous prime is 12122121021869. The next prime is 12122121021949. The reversal of 12122121021947 is 74912012122121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12122121021947 - 2³⁴ = 12104941152763 is a prime.

Together with 12122121021949, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12122121021949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6061060510973 + 6061060510974.

It is an arithmetic number, because the mean of its divisors is an integer number (6061060510974).

Almost surely, 2^{12122121021947} is an apocalyptic number.

12122121021947 is a deficient number, since it is larger than the sum of its proper divisors (1).

12122121021947 is an equidigital number, since it uses as much as digits as its factorization.

12122121021947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The spelling of 12122121021947 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, twenty-one thousand, nine hundred forty-seven".