1243220143200 has 144 divisors (see below), whose sum is σ = 4624778995200. Its totient is φ = 284164600320.

The previous prime is 1243220143199. The next prime is 1243220143247. The reversal of 1243220143200 is 23410223421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36983800 + ... + 37017399.

It is an arithmetic number, because the mean of its divisors is an integer number (32116520800).

Almost surely, 2^{1243220143200} is an apocalyptic number.

1243220143200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1243220143200 is an abundant number, since it is smaller than the sum of its proper divisors (3381558852000).

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

1243220143200 is a wasteful number, since it uses less digits than its factorization.

1243220143200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74001229 (or 74001216 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1243220143200 its reverse (23410223421), we get a palindrome (1266630366621).

The spelling of 1243220143200 in words is "one trillion, two hundred forty-three billion, two hundred twenty million, one hundred forty-three thousand, two hundred".