2121666592361 has 2 divisors, whose sum is σ = 2121666592362. Its totient is φ = 2121666592360.

The previous prime is 2121666592313. The next prime is 2121666592373. The reversal of 2121666592361 is 1632956661212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2002986342361 + 118680250000 = 1415269^2 + 344500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121666592361 is a prime.

It is not a weakly prime, because it can be changed into another prime (2121666592061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060833296180 + 1060833296181.

It is an arithmetic number, because the mean of its divisors is an integer number (1060833296181).

Almost surely, 2^{2121666592361} is an apocalyptic number.

It is an amenable number.

2121666592361 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121666592361 is an equidigital number, since it uses as much as digits as its factorization.

2121666592361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1399680, while the sum is 50.

The spelling of 2121666592361 in words is "two trillion, one hundred twenty-one billion, six hundred sixty-six million, five hundred ninety-two thousand, three hundred sixty-one".