1271206661143 has 2 divisors, whose sum is σ = 1271206661144. Its totient is φ = 1271206661142.

The previous prime is 1271206661111. The next prime is 1271206661177. The reversal of 1271206661143 is 3411666021721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1271206661143 - 2⁵ = 1271206661111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1271206661096 and 1271206661105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271206631143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635603330571 + 635603330572.

It is an arithmetic number, because the mean of its divisors is an integer number (635603330572).

Almost surely, 2^{1271206661143} is an apocalyptic number.

1271206661143 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271206661143 is an equidigital number, since it uses as much as digits as its factorization.

1271206661143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 1271206661143 in words is "one trillion, two hundred seventy-one billion, two hundred six million, six hundred sixty-one thousand, one hundred forty-three".