4048121820217 has 2 divisors, whose sum is σ = 4048121820218. Its totient is φ = 4048121820216.

The previous prime is 4048121820199. The next prime is 4048121820229. The reversal of 4048121820217 is 7120281218404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3907694750521 + 140427069696 = 1976789^2 + 374736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4048121820217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4048121820217.

It is not a weakly prime, because it can be changed into another prime (4048121820247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2024060910108 + 2024060910109.

It is an arithmetic number, because the mean of its divisors is an integer number (2024060910109).

Almost surely, 2^{4048121820217} is an apocalyptic number.

It is an amenable number.

4048121820217 is a deficient number, since it is larger than the sum of its proper divisors (1).

4048121820217 is an equidigital number, since it uses as much as digits as its factorization.

4048121820217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 57344, while the sum is 40.

The spelling of 4048121820217 in words is "four trillion, forty-eight billion, one hundred twenty-one million, eight hundred twenty thousand, two hundred seventeen".