1243312001344 has 28 divisors (see below), whose sum is σ = 2819654004064. Its totient is φ = 532848000384.

The previous prime is 1243312001293. The next prime is 1243312001353. The reversal of 1243312001344 is 4431002133421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387624554 + ... + 1387625449.

Almost surely, 2^{1243312001344} is an apocalyptic number.

1243312001344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1243312001344 is an abundant number, since it is smaller than the sum of its proper divisors (1576342002720).

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

1243312001344 is an equidigital number, since it uses as much as digits as its factorization.

1243312001344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775250022 (or 2775250012 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1243312001344 its reverse (4431002133421), we get a palindrome (5674314134765).

The spelling of 1243312001344 in words is "one trillion, two hundred forty-three billion, three hundred twelve million, one thousand, three hundred forty-four".