7212987190109 has 2 divisors, whose sum is σ = 7212987190110. Its totient is φ = 7212987190108.

The previous prime is 7212987190069. The next prime is 7212987190133. The reversal of 7212987190109 is 9010917892127.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7211131476025 + 1855714084 = 2685355^2 + 43078^2 .

It is a cyclic number.

It is not a de Polignac number, because 7212987190109 - 2²⁰ = 7212986141533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7212987190139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3606493595054 + 3606493595055.

It is an arithmetic number, because the mean of its divisors is an integer number (3606493595055).

Almost surely, 2^{7212987190109} is an apocalyptic number.

It is an amenable number.

7212987190109 is a deficient number, since it is larger than the sum of its proper divisors (1).

7212987190109 is an equidigital number, since it uses as much as digits as its factorization.

7212987190109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 56.

The spelling of 7212987190109 in words is "seven trillion, two hundred twelve billion, nine hundred eighty-seven million, one hundred ninety thousand, one hundred nine".