12121682739841 has 2 divisors, whose sum is σ = 12121682739842. Its totient is φ = 12121682739840.

The previous prime is 12121682739827. The next prime is 12121682740019. The reversal of 12121682739841 is 14893728612121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11865985647616 + 255697092225 = 3444704^2 + 505665^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121682739841 - 2⁷ = 12121682739713 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121682739821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060841369920 + 6060841369921.

It is an arithmetic number, because the mean of its divisors is an integer number (6060841369921).

Almost surely, 2^{12121682739841} is an apocalyptic number.

It is an amenable number.

12121682739841 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121682739841 is an equidigital number, since it uses as much as digits as its factorization.

12121682739841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2322432, while the sum is 55.

The spelling of 12121682739841 in words is "twelve trillion, one hundred twenty-one billion, six hundred eighty-two million, seven hundred thirty-nine thousand, eight hundred forty-one".