12000122172 has 36 divisors (see below), whose sum is σ = 30338187880. Its totient is φ = 3999441312.

The previous prime is 12000122171. The next prime is 12000122219. The reversal of 12000122172 is 27122100021.

It is a happy number.

12000122172 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000122171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264579 + ... + 306597.

Almost surely, 2^12000122172 is an apocalyptic number.

12000122172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12000122172 is an abundant number, since it is smaller than the sum of its proper divisors (18338065708).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12000122172 is a wasteful number, since it uses less digits than its factorization.

12000122172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49962 (or 49957 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

Adding to 12000122172 its reverse (27122100021), we get a palindrome (39122222193).

The spelling of 12000122172 in words is "twelve billion, one hundred twenty-two thousand, one hundred seventy-two".