1267280113811 has 2 divisors, whose sum is σ = 1267280113812. Its totient is φ = 1267280113810.

The previous prime is 1267280113727. The next prime is 1267280113823. The reversal of 1267280113811 is 1183110827621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1267280113811 - 2¹⁴ = 1267280097427 is a prime.

It is a super-2 number, since 2×1267280113811² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1267280113831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633640056905 + 633640056906.

It is an arithmetic number, because the mean of its divisors is an integer number (633640056906).

Almost surely, 2^{1267280113811} is an apocalyptic number.

1267280113811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267280113811 is an equidigital number, since it uses as much as digits as its factorization.

1267280113811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 41.

The spelling of 1267280113811 in words is "one trillion, two hundred sixty-seven billion, two hundred eighty million, one hundred thirteen thousand, eight hundred eleven".