11125129281 has 16 divisors (see below), whose sum is σ = 17081991168. Its totient is φ = 6308686800.

The previous prime is 11125129277. The next prime is 11125129283. The reversal of 11125129281 is 18292152111.

It is not a de Polignac number, because 11125129281 - 2² = 11125129277 is a prime.

It is a super-2 number, since 2×11125129281² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11125129283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2019265 + ... + 2024766.

It is an arithmetic number, because the mean of its divisors is an integer number (1067624448).

Almost surely, 2^11125129281 is an apocalyptic number.

It is an amenable number.

11125129281 is a deficient number, since it is larger than the sum of its proper divisors (5956861887).

11125129281 is a wasteful number, since it uses less digits than its factorization.

11125129281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044172.

The product of its digits is 2880, while the sum is 33.

The spelling of 11125129281 in words is "eleven billion, one hundred twenty-five million, one hundred twenty-nine thousand, two hundred eighty-one".