9121120013 has 2 divisors, whose sum is σ = 9121120014. Its totient is φ = 9121120012.

The previous prime is 9121120003. The next prime is 9121120037. The reversal of 9121120013 is 3100211219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5267566084 + 3853553929 = 72578^2 + 62077^2 .

It is a cyclic number.

It is not a de Polignac number, because 9121120013 - 2⁸ = 9121119757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9121120003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4560560006 + 4560560007.

It is an arithmetic number, because the mean of its divisors is an integer number (4560560007).

Almost surely, 2^9121120013 is an apocalyptic number.

It is an amenable number.

9121120013 is a deficient number, since it is larger than the sum of its proper divisors (1).

9121120013 is an equidigital number, since it uses as much as digits as its factorization.

9121120013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 9121120013 is about 95504.5549332596. The cubic root of 9121120013 is about 2089.3733775398.

The spelling of 9121120013 in words is "nine billion, one hundred twenty-one million, one hundred twenty thousand, thirteen".