181112211022 has 8 divisors (see below), whose sum is σ = 273742120872. Its totient is φ = 89864837400.

The previous prime is 181112211019. The next prime is 181112211029. The reversal of 181112211022 is 220112211181.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 181112210984 and 181112211002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181112211029) 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, 345633729 + ... + 345634252.

It is an arithmetic number, because the mean of its divisors is an integer number (34217765109).

Almost surely, 2^181112211022 is an apocalyptic number.

181112211022 is a deficient number, since it is larger than the sum of its proper divisors (92629909850).

181112211022 is a wasteful number, since it uses less digits than its factorization.

181112211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691268114.

The product of its (nonzero) digits is 128, while the sum is 22.

The spelling of 181112211022 in words is "one hundred eighty-one billion, one hundred twelve million, two hundred eleven thousand, twenty-two".