43240221321 has 12 divisors (see below), whose sum is σ = 63371344176. Its totient is φ = 26206194520.

The previous prime is 43240221301. The next prime is 43240221389. The reversal of 43240221321 is 12312204234.

It is a happy number.

It is not a de Polignac number, because 43240221321 - 2⁹ = 43240220809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43240221291 and 43240221300.

It is not an unprimeable number, because it can be changed into a prime (43240221301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59559171 + ... + 59559896.

It is an arithmetic number, because the mean of its divisors is an integer number (5280945348).

Almost surely, 2^43240221321 is an apocalyptic number.

It is an amenable number.

43240221321 is a deficient number, since it is larger than the sum of its proper divisors (20131122855).

43240221321 is a wasteful number, since it uses less digits than its factorization.

43240221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119119092 (or 119119081 counting only the distinct ones).

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

Adding to 43240221321 its reverse (12312204234), we get a palindrome (55552425555).

The spelling of 43240221321 in words is "forty-three billion, two hundred forty million, two hundred twenty-one thousand, three hundred twenty-one".