11111133123 has 10 divisors (see below), whose sum is σ = 16598112564. Its totient is φ = 7407422028.

The previous prime is 11111133091. The next prime is 11111133149. The reversal of 11111133123 is 32133111111.

It is not a de Polignac number, because 11111133123 - 2⁵ = 11111133091 is a prime.

It is a super-3 number, since 3×11111133123³ (a number of 31 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11111133096 and 11111133105.

It is not an unprimeable number, because it can be changed into a prime (11111133023) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 68587161 + ... + 68587322.

Almost surely, 2^11111133123 is an apocalyptic number.

11111133123 is a deficient number, since it is larger than the sum of its proper divisors (5486979441).

11111133123 is an equidigital number, since it uses as much as digits as its factorization.

11111133123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137174495 (or 137174486 counting only the distinct ones).

The product of its digits is 54, while the sum is 18.

Adding to 11111133123 its reverse (32133111111), we get a palindrome (43244244234).

The spelling of 11111133123 in words is "eleven billion, one hundred eleven million, one hundred thirty-three thousand, one hundred twenty-three".