7212110982821 has 2 divisors, whose sum is σ = 7212110982822. Its totient is φ = 7212110982820.

The previous prime is 7212110982803. The next prime is 7212110982827. The reversal of 7212110982821 is 1282890112127.

7212110982821 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 can be written as a sum of positive squares in only one way, i.e., 5715613840225 + 1496497142596 = 2390735^2 + 1223314^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7212110982821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7212110982827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606055491410 + 3606055491411.

It is an arithmetic number, because the mean of its divisors is an integer number (3606055491411).

Almost surely, 2^{7212110982821} is an apocalyptic number.

It is an amenable number.

7212110982821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212110982821 is an equidigital number, since it uses as much as digits as its factorization.

7212110982821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 44.

The spelling of 7212110982821 in words is "seven trillion, two hundred twelve billion, one hundred ten million, nine hundred eighty-two thousand, eight hundred twenty-one".