1271566553011 has 2 divisors, whose sum is σ = 1271566553012. Its totient is φ = 1271566553010.

The previous prime is 1271566552979. The next prime is 1271566553029. The reversal of 1271566553011 is 1103556651721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1271566553011 - 2⁵ = 1271566552979 is a prime.

It is a super-2 number, since 2×1271566553011² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1271566553071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635783276505 + 635783276506.

It is an arithmetic number, because the mean of its divisors is an integer number (635783276506).

Almost surely, 2^{1271566553011} is an apocalyptic number.

1271566553011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271566553011 is an equidigital number, since it uses as much as digits as its factorization.

1271566553011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 1271566553011 in words is "one trillion, two hundred seventy-one billion, five hundred sixty-six million, five hundred fifty-three thousand, eleven".