2113120109 has 2 divisors, whose sum is σ = 2113120110. Its totient is φ = 2113120108.

The previous prime is 2113120069. The next prime is 2113120133. The reversal of 2113120109 is 9010213112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2081366884 + 31753225 = 45622^2 + 5635^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113120109 - 2¹² = 2113116013 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 (2113120199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056560054 + 1056560055.

It is an arithmetic number, because the mean of its divisors is an integer number (1056560055).

Almost surely, 2^2113120109 is an apocalyptic number.

It is an amenable number.

2113120109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113120109 is an equidigital number, since it uses as much as digits as its factorization.

2113120109 is an evil number, because the sum of its binary digits is even.

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

The square root of 2113120109 is about 45968.6861787456. The cubic root of 2113120109 is about 1283.2405093410.

The spelling of 2113120109 in words is "two billion, one hundred thirteen million, one hundred twenty thousand, one hundred nine".