11125666531 has 6 divisors (see below), whose sum is σ = 12942101940. Its totient is φ = 9536285556.

The previous prime is 11125666529. The next prime is 11125666579. The reversal of 11125666531 is 13566652111.

It is not a de Polignac number, because 11125666531 - 2¹ = 11125666529 is a prime.

It is a super-2 number, since 2×11125666531² (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 (11125666631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113527161 + ... + 113527258.

It is an arithmetic number, because the mean of its divisors is an integer number (2157016990).

Almost surely, 2^11125666531 is an apocalyptic number.

11125666531 is a deficient number, since it is larger than the sum of its proper divisors (1816435409).

11125666531 is an equidigital number, since it uses as much as digits as its factorization.

11125666531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227054433 (or 227054426 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The spelling of 11125666531 in words is "eleven billion, one hundred twenty-five million, six hundred sixty-six thousand, five hundred thirty-one".