12172920113 has 2 divisors, whose sum is σ = 12172920114. Its totient is φ = 12172920112.

The previous prime is 12172920107. The next prime is 12172920121. The reversal of 12172920113 is 31102927121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10842640384 + 1330279729 = 104128^2 + 36473^2 .

It is a cyclic number.

It is not a de Polignac number, because 12172920113 - 2²² = 12168725809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12172920013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086460056 + 6086460057.

It is an arithmetic number, because the mean of its divisors is an integer number (6086460057).

Almost surely, 2^12172920113 is an apocalyptic number.

It is an amenable number.

12172920113 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172920113 is an equidigital number, since it uses as much as digits as its factorization.

12172920113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The spelling of 12172920113 in words is "twelve billion, one hundred seventy-two million, nine hundred twenty thousand, one hundred thirteen".