1212031001309 has 2 divisors, whose sum is σ = 1212031001310. Its totient is φ = 1212031001308.

The previous prime is 1212031001261. The next prime is 1212031001317. The reversal of 1212031001309 is 9031001302121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1189401816409 + 22629184900 = 1090597^2 + 150430^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212031001309 - 2²⁰ = 1212029952733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212031004309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606015500654 + 606015500655.

It is an arithmetic number, because the mean of its divisors is an integer number (606015500655).

Almost surely, 2^{1212031001309} is an apocalyptic number.

It is an amenable number.

1212031001309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212031001309 is an equidigital number, since it uses as much as digits as its factorization.

1212031001309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 23.

The spelling of 1212031001309 in words is "one trillion, two hundred twelve billion, thirty-one million, one thousand, three hundred nine".