12130312220 has 96 divisors (see below), whose sum is σ = 27838121472. Its totient is φ = 4413074688.

The previous prime is 12130312213. The next prime is 12130312247. The reversal of 12130312220 is 2221303121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14738729 + ... + 14739551.

It is an arithmetic number, because the mean of its divisors is an integer number (289980432).

Almost surely, 2^12130312220 is an apocalyptic number.

12130312220 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 12130312220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13919060736).

12130312220 is an abundant number, since it is smaller than the sum of its proper divisors (15707809252).

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

12130312220 is a wasteful number, since it uses less digits than its factorization.

12130312220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 12130312220 its reverse (2221303121), we get a palindrome (14351615341).

Subtracting from 12130312220 its reverse (2221303121), we obtain a palindrome (9909009099).

The spelling of 12130312220 in words is "twelve billion, one hundred thirty million, three hundred twelve thousand, two hundred twenty".