4242720025121 has 2 divisors, whose sum is σ = 4242720025122. Its totient is φ = 4242720025120.

The previous prime is 4242720025097. The next prime is 4242720025139. The reversal of 4242720025121 is 1215200272424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3590646010000 + 652074015121 = 1894900^2 + 807511^2 .

It is a cyclic number.

It is not a de Polignac number, because 4242720025121 - 2¹⁸ = 4242719762977 is a prime.

It is not a weakly prime, because it can be changed into another prime (4242720025321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121360012560 + 2121360012561.

It is an arithmetic number, because the mean of its divisors is an integer number (2121360012561).

Almost surely, 2^{4242720025121} is an apocalyptic number.

It is an amenable number.

4242720025121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4242720025121 is an equidigital number, since it uses as much as digits as its factorization.

4242720025121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

Adding to 4242720025121 its reverse (1215200272424), we get a palindrome (5457920297545).

The spelling of 4242720025121 in words is "four trillion, two hundred forty-two billion, seven hundred twenty million, twenty-five thousand, one hundred twenty-one".