8213072136109 has 2 divisors, whose sum is σ = 8213072136110. Its totient is φ = 8213072136108.

The previous prime is 8213072136083. The next prime is 8213072136119. The reversal of 8213072136109 is 9016312703128.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8090867358025 + 122204778084 = 2844445^2 + 349578^2 .

It is a cyclic number.

It is not a de Polignac number, because 8213072136109 - 2¹¹ = 8213072134061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8213072136119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4106536068054 + 4106536068055.

It is an arithmetic number, because the mean of its divisors is an integer number (4106536068055).

Almost surely, 2^{8213072136109} is an apocalyptic number.

It is an amenable number.

8213072136109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8213072136109 is an equidigital number, since it uses as much as digits as its factorization.

8213072136109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 43.

The spelling of 8213072136109 in words is "eight trillion, two hundred thirteen billion, seventy-two million, one hundred thirty-six thousand, one hundred nine".