2646211121 has 2 divisors, whose sum is σ = 2646211122. Its totient is φ = 2646211120.

The previous prime is 2646211079. The next prime is 2646211123. The reversal of 2646211121 is 1211126462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2526067600 + 120143521 = 50260^2 + 10961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2646211121 is a prime.

Together with 2646211123, 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 (2646211123) 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, 1323105560 + 1323105561.

It is an arithmetic number, because the mean of its divisors is an integer number (1323105561).

Almost surely, 2^2646211121 is an apocalyptic number.

It is an amenable number.

2646211121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2646211121 is an equidigital number, since it uses as much as digits as its factorization.

2646211121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 26.

The square root of 2646211121 is about 51441.3366953076. The cubic root of 2646211121 is about 1383.1676727284.

Adding to 2646211121 its reverse (1211126462), we get a palindrome (3857337583).

The spelling of 2646211121 in words is "two billion, six hundred forty-six million, two hundred eleven thousand, one hundred twenty-one".