11266871281 has 16 divisors (see below), whose sum is σ = 11682335808. Its totient is φ = 10860616000.

The previous prime is 11266871249. The next prime is 11266871303. The reversal of 11266871281 is 18217866211.

It is a cyclic number.

It is not a de Polignac number, because 11266871281 - 2⁵ = 11266871249 is a prime.

It is a super-2 number, since 2×11266871281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11266871881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 693210 + ... + 709276.

It is an arithmetic number, because the mean of its divisors is an integer number (730145988).

Almost surely, 2^11266871281 is an apocalyptic number.

It is an amenable number.

11266871281 is a deficient number, since it is larger than the sum of its proper divisors (415464527).

11266871281 is a wasteful number, since it uses less digits than its factorization.

11266871281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16352.

The product of its digits is 64512, while the sum is 43.

The spelling of 11266871281 in words is "eleven billion, two hundred sixty-six million, eight hundred seventy-one thousand, two hundred eighty-one".