43123121332 has 24 divisors (see below), whose sum is σ = 79926129864. Its totient is φ = 20287767552.

The previous prime is 43123121323. The next prime is 43123121351. The reversal of 43123121332 is 23312132134.

It can be written as a sum of positive squares in 4 ways, for example, as 5017738896 + 38105382436 = 70836^2 + 195206^2 .

It is a junction number, because it is equal to n+sod(n) for n = 43123121297 and 43123121306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174688 + ... + 341704.

It is an arithmetic number, because the mean of its divisors is an integer number (3330255411).

Almost surely, 2^43123121332 is an apocalyptic number.

It is an amenable number.

43123121332 is a deficient number, since it is larger than the sum of its proper divisors (36803008532).

43123121332 is a wasteful number, since it uses less digits than its factorization.

43123121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170835 (or 170833 counting only the distinct ones).

The product of its digits is 2592, while the sum is 25.

Adding to 43123121332 its reverse (23312132134), we get a palindrome (66435253466).

The spelling of 43123121332 in words is "forty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, three hundred thirty-two".