2121847376039 has 2 divisors, whose sum is σ = 2121847376040. Its totient is φ = 2121847376038.

The previous prime is 2121847376029. The next prime is 2121847376083. The reversal of 2121847376039 is 9306737481212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121847376039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121847376029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060923688019 + 1060923688020.

It is an arithmetic number, because the mean of its divisors is an integer number (1060923688020).

Almost surely, 2^{2121847376039} is an apocalyptic number.

2121847376039 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121847376039 is an equidigital number, since it uses as much as digits as its factorization.

2121847376039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 2121847376039 in words is "two trillion, one hundred twenty-one billion, eight hundred forty-seven million, three hundred seventy-six thousand, thirty-nine".