12143401220 has 96 divisors (see below), whose sum is σ = 28101427200. Its totient is φ = 4390243200.

The previous prime is 12143401187. The next prime is 12143401243. The reversal of 12143401220 is 2210434121.

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 = 12143401192 and 12143401201.

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, 829121 + ... + 843639.

It is an arithmetic number, because the mean of its divisors is an integer number (292723200).

Almost surely, 2^12143401220 is an apocalyptic number.

12143401220 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 12143401220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14050713600).

12143401220 is an abundant number, since it is smaller than the sum of its proper divisors (15958025980).

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

12143401220 is a wasteful number, since it uses less digits than its factorization.

12143401220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14649 (or 14647 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 12143401220 its reverse (2210434121), we get a palindrome (14353835341).

The spelling of 12143401220 in words is "twelve billion, one hundred forty-three million, four hundred one thousand, two hundred twenty".