12120220116 has 72 divisors (see below), whose sum is σ = 32000963904. Its totient is φ = 3860588160.

The previous prime is 12120220109. The next prime is 12120220117. The reversal of 12120220116 is 61102202121.

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 (12120220117) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 896640 + ... + 910056.

It is an arithmetic number, because the mean of its divisors is an integer number (444457832).

Almost surely, 2^12120220116 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120220116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16000481952).

12120220116 is an abundant number, since it is smaller than the sum of its proper divisors (19880743788).

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

12120220116 is a wasteful number, since it uses less digits than its factorization.

12120220116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14541 (or 14536 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12120220116 its reverse (61102202121), we get a palindrome (73222422237).

The spelling of 12120220116 in words is "twelve billion, one hundred twenty million, two hundred twenty thousand, one hundred sixteen".