12143030400 has 144 divisors (see below), whose sum is σ = 43329218010. Its totient is φ = 3238133760.

The previous prime is 12143030329. The next prime is 12143030401. The reversal of 12143030400 is 403034121.

It can be written as a sum of positive squares in 3 ways, for example, as 9527321664 + 2615708736 = 97608^2 + 51144^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12143030401) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 182017 + ... + 239616.

Almost surely, 2^12143030400 is an apocalyptic number.

12143030400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12143030400 is an abundant number, since it is smaller than the sum of its proper divisors (31186187610).

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

12143030400 is a wasteful number, since it uses less digits than its factorization.

12143030400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421663 (or 421643 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 12143030400 its reverse (403034121), we get a palindrome (12546064521).

The spelling of 12143030400 in words is "twelve billion, one hundred forty-three million, thirty thousand, four hundred".