7216367021 has 2 divisors, whose sum is σ = 7216367022. Its totient is φ = 7216367020.

The previous prime is 7216366987. The next prime is 7216367071. The reversal of 7216367021 is 1207636127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4575846025 + 2640520996 = 67645^2 + 51386^2 .

It is an emirp because it is prime and its reverse (1207636127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7216367021 - 2¹⁸ = 7216104877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7216367071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3608183510 + 3608183511.

It is an arithmetic number, because the mean of its divisors is an integer number (3608183511).

Almost surely, 2^7216367021 is an apocalyptic number.

It is an amenable number.

7216367021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7216367021 is an equidigital number, since it uses as much as digits as its factorization.

7216367021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 7216367021 is about 84949.2025919019. The cubic root of 7216367021 is about 1932.4408272023.

The spelling of 7216367021 in words is "seven billion, two hundred sixteen million, three hundred sixty-seven thousand, twenty-one".