43340423121 has 48 divisors (see below), whose sum is σ = 65775340800. Its totient is φ = 27463798656.

The previous prime is 43340423117. The next prime is 43340423123. The reversal of 43340423121 is 12132404334.

43340423121 is a `hidden beast` number, since 4 + 3 + 3 + 404 + 231 + 21 = 666.

It is not a de Polignac number, because 43340423121 - 2² = 43340423117 is a prime.

It is a super-2 number, since 2×43340423121² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (43340423123) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 4646100 + ... + 4655418.

It is an arithmetic number, because the mean of its divisors is an integer number (1370319600).

Almost surely, 2^43340423121 is an apocalyptic number.

It is an amenable number.

43340423121 is a deficient number, since it is larger than the sum of its proper divisors (22434917679).

43340423121 is a wasteful number, since it uses less digits than its factorization.

43340423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9630 (or 9627 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 43340423121 its reverse (12132404334), we get a palindrome (55472827455).

The spelling of 43340423121 in words is "forty-three billion, three hundred forty million, four hundred twenty-three thousand, one hundred twenty-one".