12121240103309 has 2 divisors, whose sum is σ = 12121240103310. Its totient is φ = 12121240103308.

The previous prime is 12121240103281. The next prime is 12121240103369. The reversal of 12121240103309 is 90330104212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7098361275625 + 5022878827684 = 2664275^2 + 2241178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121240103309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12121240103369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060620051654 + 6060620051655.

It is an arithmetic number, because the mean of its divisors is an integer number (6060620051655).

Almost surely, 2^{12121240103309} is an apocalyptic number.

It is an amenable number.

12121240103309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121240103309 is an equidigital number, since it uses as much as digits as its factorization.

12121240103309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 12121240103309 in words is "twelve trillion, one hundred twenty-one billion, two hundred forty million, one hundred three thousand, three hundred nine".