12120202320 has 80 divisors (see below), whose sum is σ = 37673636352. Its totient is φ = 3223365120.

The previous prime is 12120202271. The next prime is 12120202321. The reversal of 12120202320 is 2320202121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12120202320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12120202321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21825 + ... + 157215.

Almost surely, 2^12120202320 is an apocalyptic number.

12120202320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12120202320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18836818176).

12120202320 is an abundant number, since it is smaller than the sum of its proper divisors (25553434032).

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

12120202320 is a wasteful number, since it uses less digits than its factorization.

12120202320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135780 (or 135774 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 12120202320 its reverse (2320202121), we get a palindrome (14440404441).

The spelling of 12120202320 in words is "twelve billion, one hundred twenty million, two hundred two thousand, three hundred twenty".