1243104221040 has 160 divisors (see below), whose sum is σ = 4209741559296. Its totient is φ = 300943610880.

The previous prime is 1243104221011. The next prime is 1243104221063. The reversal of 1243104221040 is 401224013421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1243104221040.

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 31 ways as a sum of consecutive naturals, for example, 1595434 + ... + 2243126.

Almost surely, 2^{1243104221040} is an apocalyptic number.

1243104221040 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 1243104221040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2104870779648).

1243104221040 is an abundant number, since it is smaller than the sum of its proper divisors (2966637338256).

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

1243104221040 is a wasteful number, since it uses less digits than its factorization.

1243104221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648447 (or 648441 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 1243104221040 its reverse (401224013421), we get a palindrome (1644328234461).

The spelling of 1243104221040 in words is "one trillion, two hundred forty-three billion, one hundred four million, two hundred twenty-one thousand, forty".