11133556231 has 4 divisors (see below), whose sum is σ = 12724064272. Its totient is φ = 9543048192.

The previous prime is 11133556177. The next prime is 11133556243. The reversal of 11133556231 is 13265533111.

11133556231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13265533111 = 35527 ⋅373393.

It is a cyclic number.

It is not a de Polignac number, because 11133556231 - 2¹⁵ = 11133523463 is a prime.

It is a super-2 number, since 2×11133556231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11133556193 and 11133556202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11133556261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795254010 + ... + 795254023.

It is an arithmetic number, because the mean of its divisors is an integer number (3181016068).

Almost surely, 2^11133556231 is an apocalyptic number.

11133556231 is a deficient number, since it is larger than the sum of its proper divisors (1590508041).

11133556231 is an equidigital number, since it uses as much as digits as its factorization.

11133556231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590508040.

The product of its digits is 8100, while the sum is 31.

The spelling of 11133556231 in words is "eleven billion, one hundred thirty-three million, five hundred fifty-six thousand, two hundred thirty-one".