247740414850121 has 2 divisors, whose sum is σ = 247740414850122. Its totient is φ = 247740414850120.

The previous prime is 247740414850111. The next prime is 247740414850133. The reversal of 247740414850121 is 121058414047742.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240251085001225 + 7489329848896 = 15500035^2 + 2736664^2 .

It is a cyclic number.

It is not a de Polignac number, because 247740414850121 - 2³⁰ = 247739341108297 is a prime.

It is a super-2 number, since 2×247740414850121² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 247740414850121.

It is not a weakly prime, because it can be changed into another prime (247740414850111) 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, 123870207425060 + 123870207425061.

It is an arithmetic number, because the mean of its divisors is an integer number (123870207425061).

Almost surely, 2^{247740414850121} is an apocalyptic number.

It is an amenable number.

247740414850121 is a deficient number, since it is larger than the sum of its proper divisors (1).

247740414850121 is an equidigital number, since it uses as much as digits as its factorization.

247740414850121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2007040, while the sum is 50.

Adding to 247740414850121 its reverse (121058414047742), we get a palindrome (368798828897863).

The spelling of 247740414850121 in words is "two hundred forty-seven trillion, seven hundred forty billion, four hundred fourteen million, eight hundred fifty thousand, one hundred twenty-one".