12120434502 has 64 divisors (see below), whose sum is σ = 26887852800. Its totient is φ = 3611792000.

The previous prime is 12120434489. The next prime is 12120434503. The reversal of 12120434502 is 20543402121.

12120434502 is a modest number, since divided by 434502 gives 1212 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120434503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 987133 + ... + 999335.

It is an arithmetic number, because the mean of its divisors is an integer number (420122700).

Almost surely, 2^12120434502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120434502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13443926400).

12120434502 is an abundant number, since it is smaller than the sum of its proper divisors (14767418298).

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

12120434502 is a wasteful number, since it uses less digits than its factorization.

12120434502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12469.

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 12120434502 its reverse (20543402121), we get a palindrome (32663836623).

The spelling of 12120434502 in words is "twelve billion, one hundred twenty million, four hundred thirty-four thousand, five hundred two".