112181866520381 has 4 divisors (see below), whose sum is σ = 128207847451872. Its totient is φ = 96155885588892.

The previous prime is 112181866520377. The next prime is 112181866520387. The reversal of 112181866520381 is 183025668181211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 112181866520381 - 2² = 112181866520377 is a prime.

It is a super-2 number, since 2×112181866520381² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112181866520387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8012990465735 + ... + 8012990465748.

It is an arithmetic number, because the mean of its divisors is an integer number (32051961862968).

Almost surely, 2^{112181866520381} is an apocalyptic number.

It is an amenable number.

112181866520381 is a deficient number, since it is larger than the sum of its proper divisors (16025980931491).

112181866520381 is an equidigital number, since it uses as much as digits as its factorization.

112181866520381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16025980931490.

The product of its (nonzero) digits is 1105920, while the sum is 53.

The spelling of 112181866520381 in words is "one hundred twelve trillion, one hundred eighty-one billion, eight hundred sixty-six million, five hundred twenty thousand, three hundred eighty-one".