7212297109 has 2 divisors, whose sum is σ = 7212297110. Its totient is φ = 7212297108.

The previous prime is 7212297083. The next prime is 7212297137. The reversal of 7212297109 is 9017922127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5941018084 + 1271279025 = 77078^2 + 35655^2 .

It is a cyclic number.

It is not a de Polignac number, because 7212297109 - 2¹¹ = 7212295061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7212297139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606148554 + 3606148555.

It is an arithmetic number, because the mean of its divisors is an integer number (3606148555).

Almost surely, 2^7212297109 is an apocalyptic number.

It is an amenable number.

7212297109 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212297109 is an equidigital number, since it uses as much as digits as its factorization.

7212297109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 40.

The square root of 7212297109 is about 84925.2442386832. The cubic root of 7212297109 is about 1932.0774706314.

The spelling of 7212297109 in words is "seven billion, two hundred twelve million, two hundred ninety-seven thousand, one hundred nine".