181000120111022 has 4 divisors (see below), whose sum is σ = 271500180166536. Its totient is φ = 90500060055510.

The previous prime is 181000120111003. The next prime is 181000120111037. The reversal of 181000120111022 is 220111021000181.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×181000120111022² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 181000120110985 and 181000120111003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45250030027754 + ... + 45250030027757.

It is an arithmetic number, because the mean of its divisors is an integer number (67875045041634).

Almost surely, 2^{181000120111022} is an apocalyptic number.

181000120111022 is a deficient number, since it is larger than the sum of its proper divisors (90500060055514).

181000120111022 is an equidigital number, since it uses as much as digits as its factorization.

181000120111022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90500060055513.

The product of its (nonzero) digits is 64, while the sum is 20.

The spelling of 181000120111022 in words is "one hundred eighty-one trillion, one hundred twenty million, one hundred eleven thousand, twenty-two".