12030050172 has 36 divisors (see below), whose sum is σ = 32652994920. Its totient is φ = 3437157024.

The previous prime is 12030050171. The next prime is 12030050213. The reversal of 12030050172 is 27105003021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12030050171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10229047 + ... + 10230222.

Almost surely, 2^12030050172 is an apocalyptic number.

12030050172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12030050172 is an abundant number, since it is smaller than the sum of its proper divisors (20622944748).

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

12030050172 is a wasteful number, since it uses less digits than its factorization.

12030050172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20459290 (or 20459281 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

Adding to 12030050172 its reverse (27105003021), we get a palindrome (39135053193).

The spelling of 12030050172 in words is "twelve billion, thirty million, fifty thousand, one hundred seventy-two".