2119115561 has 2 divisors, whose sum is σ = 2119115562. Its totient is φ = 2119115560.

The previous prime is 2119115533. The next prime is 2119115563. The reversal of 2119115561 is 1655119112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1742561536 + 376554025 = 41744^2 + 19405^2 .

It is a cyclic number.

It is not a de Polignac number, because 2119115561 - 2⁶ = 2119115497 is a prime.

Together with 2119115563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2119115563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059557780 + 1059557781.

It is an arithmetic number, because the mean of its divisors is an integer number (1059557781).

Almost surely, 2^2119115561 is an apocalyptic number.

It is an amenable number.

2119115561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2119115561 is an equidigital number, since it uses as much as digits as its factorization.

2119115561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2700, while the sum is 32.

The square root of 2119115561 is about 46033.8523371660. The cubic root of 2119115561 is about 1284.4529884711.

The spelling of 2119115561 in words is "two billion, one hundred nineteen million, one hundred fifteen thousand, five hundred sixty-one".