12103242320 has 80 divisors (see below), whose sum is σ = 30719981712. Its totient is φ = 4407644160.

The previous prime is 12103242317. The next prime is 12103242323. The reversal of 12103242320 is 2324230121.

It is an interprime number because it is at equal distance from previous prime (12103242317) and next prime (12103242323).

It can be written as a sum of positive squares in 8 ways, for example, as 54228496 + 12049013824 = 7364^2 + 109768^2 .

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 (20).

It is a junction number, because it is equal to n+sod(n) for n = 12103242292 and 12103242301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103242323) 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, 3791 + ... + 155630.

Almost surely, 2^12103242320 is an apocalyptic number.

12103242320 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 12103242320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15359990856).

12103242320 is an abundant number, since it is smaller than the sum of its proper divisors (18616739392).

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

12103242320 is a wasteful number, since it uses less digits than its factorization.

12103242320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159520 (or 159514 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 12103242320 its reverse (2324230121), we get a palindrome (14427472441).

The spelling of 12103242320 in words is "twelve billion, one hundred three million, two hundred forty-two thousand, three hundred twenty".