122181143 has 4 divisors (see below), whose sum is σ = 139635600. Its totient is φ = 104726688.

The previous prime is 122181119. The next prime is 122181179. The reversal of 122181143 is 341181221.

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

It is a cyclic number.

It is not a de Polignac number, because 122181143 - 2¹² = 122177047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122181443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8727218 + ... + 8727231.

It is an arithmetic number, because the mean of its divisors is an integer number (34908900).

Almost surely, 2^122181143 is an apocalyptic number.

122181143 is a deficient number, since it is larger than the sum of its proper divisors (17454457).

122181143 is an equidigital number, since it uses as much as digits as its factorization.

122181143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17454456.

The product of its digits is 384, while the sum is 23.

The square root of 122181143 is about 11053.5579339867. The cubic root of 122181143 is about 496.2129123537.

The spelling of 122181143 in words is "one hundred twenty-two million, one hundred eighty-one thousand, one hundred forty-three".