1123711253181 has 96 divisors (see below), whose sum is σ = 1876853099520. Its totient is φ = 663588288000.

The previous prime is 1123711253123. The next prime is 1123711253191. The reversal of 1123711253181 is 1813521173211.

1123711253181 is a `hidden beast` number, since 1 + 1 + 2 + 3 + 7 + 112 + 531 + 8 + 1 = 666.

It is not a de Polignac number, because 1123711253181 - 2⁹ = 1123711252669 is a prime.

It is a super-2 number, since 2×1123711253181² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123711253191) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 115591401 + ... + 115601121.

It is an arithmetic number, because the mean of its divisors is an integer number (19550553120).

Almost surely, 2^{1123711253181} is an apocalyptic number.

1123711253181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1123711253181 is a deficient number, since it is larger than the sum of its proper divisors (753141846339).

1123711253181 is a wasteful number, since it uses less digits than its factorization.

1123711253181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10656 (or 10639 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The spelling of 1123711253181 in words is "one trillion, one hundred twenty-three billion, seven hundred eleven million, two hundred fifty-three thousand, one hundred eighty-one".