12400143220 has 96 divisors (see below), whose sum is σ = 27278125056. Its totient is φ = 4729536000.

The previous prime is 12400143209. The next prime is 12400143227. The reversal of 12400143220 is 2234100421.

12400143220 is a modest number, since divided by 143220 gives 12400 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400143227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17688870 + ... + 17689570.

It is an arithmetic number, because the mean of its divisors is an integer number (284147136).

Almost surely, 2^12400143220 is an apocalyptic number.

12400143220 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 12400143220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13639062528).

12400143220 is an abundant number, since it is smaller than the sum of its proper divisors (14877981836).

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

12400143220 is a wasteful number, since it uses less digits than its factorization.

12400143220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1119 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 12400143220 its reverse (2234100421), we get a palindrome (14634243641).

The spelling of 12400143220 in words is "twelve billion, four hundred million, one hundred forty-three thousand, two hundred twenty".