181111313230121 has 4 divisors (see below), whose sum is σ = 181112738544000. Its totient is φ = 181109887916244.

The previous prime is 181111313230027. The next prime is 181111313230147. The reversal of 181111313230121 is 121032313111181.

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 181111313230121 - 2⁴⁶ = 110742569052457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (181111313230321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 712466321 + ... + 712720478.

It is an arithmetic number, because the mean of its divisors is an integer number (45278184636000).

Almost surely, 2^{181111313230121} is an apocalyptic number.

It is an amenable number.

181111313230121 is a deficient number, since it is larger than the sum of its proper divisors (1425313879).

181111313230121 is a wasteful number, since it uses less digits than its factorization.

181111313230121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425313878.

The product of its (nonzero) digits is 864, while the sum is 29.

The spelling of 181111313230121 in words is "one hundred eighty-one trillion, one hundred eleven billion, three hundred thirteen million, two hundred thirty thousand, one hundred twenty-one".