1261314610811 has 2 divisors, whose sum is σ = 1261314610812. Its totient is φ = 1261314610810.

The previous prime is 1261314610763. The next prime is 1261314610817. The reversal of 1261314610811 is 1180164131621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1261314610811 - 2³⁰ = 1260240868987 is a prime.

It is not a weakly prime, because it can be changed into another prime (1261314610817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630657305405 + 630657305406.

It is an arithmetic number, because the mean of its divisors is an integer number (630657305406).

Almost surely, 2^{1261314610811} is an apocalyptic number.

1261314610811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261314610811 is an equidigital number, since it uses as much as digits as its factorization.

1261314610811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The spelling of 1261314610811 in words is "one trillion, two hundred sixty-one billion, three hundred fourteen million, six hundred ten thousand, eight hundred eleven".