7220411721671 has 2 divisors, whose sum is σ = 7220411721672. Its totient is φ = 7220411721670.

The previous prime is 7220411721629. The next prime is 7220411721701. The reversal of 7220411721671 is 1761271140227.

7220411721671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1761271140227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7220411721671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7220411723671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3610205860835 + 3610205860836.

It is an arithmetic number, because the mean of its divisors is an integer number (3610205860836).

Almost surely, 2^{7220411721671} is an apocalyptic number.

7220411721671 is a deficient number, since it is larger than the sum of its proper divisors (1).

7220411721671 is an equidigital number, since it uses as much as digits as its factorization.

7220411721671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 41.

Adding to 7220411721671 its reverse (1761271140227), we get a palindrome (8981682861898).

The spelling of 7220411721671 in words is "seven trillion, two hundred twenty billion, four hundred eleven million, seven hundred twenty-one thousand, six hundred seventy-one".