2120757109 has 2 divisors, whose sum is σ = 2120757110. Its totient is φ = 2120757108.

The previous prime is 2120757101. The next prime is 2120757127. The reversal of 2120757109 is 9017570212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1445900625 + 674856484 = 38025^2 + 25978^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120757109 - 2³ = 2120757101 is a prime.

It is a super-2 number, since 2×2120757109² = 8995221430748075762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120757101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060378554 + 1060378555.

It is an arithmetic number, because the mean of its divisors is an integer number (1060378555).

Almost surely, 2^2120757109 is an apocalyptic number.

It is an amenable number.

2120757109 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120757109 is an equidigital number, since it uses as much as digits as its factorization.

2120757109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 2120757109 is about 46051.6786773295. The cubic root of 2120757109 is about 1284.7845650130.

The spelling of 2120757109 in words is "two billion, one hundred twenty million, seven hundred fifty-seven thousand, one hundred nine".