3121000000109 has 2 divisors, whose sum is σ = 3121000000110. Its totient is φ = 3121000000108.

The previous prime is 3121000000103. The next prime is 3121000000147. The reversal of 3121000000109 is 9010000001213.

It is a happy number.

3121000000109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2141685902500 + 979314097609 = 1463450^2 + 989603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121000000109 is a prime.

It is a super-3 number, since 3×3121000000109³ (a number of 38 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121000000103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560500000054 + 1560500000055.

It is an arithmetic number, because the mean of its divisors is an integer number (1560500000055).

Almost surely, 2^{3121000000109} is an apocalyptic number.

It is an amenable number.

3121000000109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121000000109 is an equidigital number, since it uses as much as digits as its factorization.

3121000000109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The spelling of 3121000000109 in words is "three trillion, one hundred twenty-one billion, one hundred nine", and thus it is an aban number.