43312121344 has 40 divisors (see below), whose sum is σ = 86601754008. Its totient is φ = 21640519680.

The previous prime is 43312121341. The next prime is 43312121357. The reversal of 43312121344 is 44312121334.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43312121341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700984 + ... + 760264.

Almost surely, 2^43312121344 is an apocalyptic number.

It is an amenable number.

43312121344 is a deficient number, since it is larger than the sum of its proper divisors (43289632664).

43312121344 is an equidigital number, since it uses as much as digits as its factorization.

43312121344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60726 (or 60710 counting only the distinct ones).

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

Adding to 43312121344 its reverse (44312121334), we get a palindrome (87624242678).

The spelling of 43312121344 in words is "forty-three billion, three hundred twelve million, one hundred twenty-one thousand, three hundred forty-four".