121724006641 has 2 divisors, whose sum is σ = 121724006642. Its totient is φ = 121724006640.

The previous prime is 121724006639. The next prime is 121724006671. The reversal of 121724006641 is 146600427121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106546752225 + 15177254416 = 326415^2 + 123196^2 .

It is an emirp because it is prime and its reverse (146600427121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121724006641 - 2¹ = 121724006639 is a prime.

Together with 121724006639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 121724006597 and 121724006606.

It is not a weakly prime, because it can be changed into another prime (121724006671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60862003320 + 60862003321.

It is an arithmetic number, because the mean of its divisors is an integer number (60862003321).

Almost surely, 2^121724006641 is an apocalyptic number.

It is an amenable number.

121724006641 is a deficient number, since it is larger than the sum of its proper divisors (1).

121724006641 is an equidigital number, since it uses as much as digits as its factorization.

121724006641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 121724006641 in words is "one hundred twenty-one billion, seven hundred twenty-four million, six thousand, six hundred forty-one".