2120996676569 has 2 divisors, whose sum is σ = 2120996676570. Its totient is φ = 2120996676568.

The previous prime is 2120996676559. The next prime is 2120996676571. The reversal of 2120996676569 is 9656766990212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2120766001225 + 230675344 = 1456285^2 + 15188^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120996676569 - 2⁴ = 2120996676553 is a prime.

It is a super-2 number, since 2×2120996676569² (a number of 25 digits) contains 22 as substring.

Together with 2120996676571, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2120996676499 and 2120996676508.

It is not a weakly prime, because it can be changed into another prime (2120996676559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060498338284 + 1060498338285.

It is an arithmetic number, because the mean of its divisors is an integer number (1060498338285).

Almost surely, 2^{2120996676569} is an apocalyptic number.

It is an amenable number.

2120996676569 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120996676569 is an equidigital number, since it uses as much as digits as its factorization.

2120996676569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132269760, while the sum is 68.

The spelling of 2120996676569 in words is "two trillion, one hundred twenty billion, nine hundred ninety-six million, six hundred seventy-six thousand, five hundred sixty-nine".