3123202120109 has 2 divisors, whose sum is σ = 3123202120110. Its totient is φ = 3123202120108.

The previous prime is 3123202120091. The next prime is 3123202120111. The reversal of 3123202120109 is 9010212023213.

Together with previous prime (3123202120091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3083525464009 + 39676656100 = 1755997^2 + 199190^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123202120109 - 2²⁸ = 3122933684653 is a prime.

Together with 3123202120111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3123202150109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1561601060054 + 1561601060055.

It is an arithmetic number, because the mean of its divisors is an integer number (1561601060055).

Almost surely, 2^{3123202120109} is an apocalyptic number.

It is an amenable number.

3123202120109 is a deficient number, since it is larger than the sum of its proper divisors (1).

3123202120109 is an equidigital number, since it uses as much as digits as its factorization.

3123202120109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The spelling of 3123202120109 in words is "three trillion, one hundred twenty-three billion, two hundred two million, one hundred twenty thousand, one hundred nine".