2143486612261 has 2 divisors, whose sum is σ = 2143486612262. Its totient is φ = 2143486612260.

The previous prime is 2143486612177. The next prime is 2143486612301. The reversal of 2143486612261 is 1622166843412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1942608750625 + 200877861636 = 1393775^2 + 448194^2 .

It is a cyclic number.

It is not a de Polignac number, because 2143486612261 - 2¹⁷ = 2143486481189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143486612961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071743306130 + 1071743306131.

It is an arithmetic number, because the mean of its divisors is an integer number (1071743306131).

Almost surely, 2^{2143486612261} is an apocalyptic number.

It is an amenable number.

2143486612261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143486612261 is an equidigital number, since it uses as much as digits as its factorization.

2143486612261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 46.

The spelling of 2143486612261 in words is "two trillion, one hundred forty-three billion, four hundred eighty-six million, six hundred twelve thousand, two hundred sixty-one".