43123401123 has 16 divisors (see below), whose sum is σ = 63518937600. Its totient is φ = 25804565280.

The previous prime is 43123401121. The next prime is 43123401127. The reversal of 43123401123 is 32110432134.

It is a happy number.

It is not a de Polignac number, because 43123401123 - 2¹ = 43123401121 is a prime.

It is a super-2 number, since 2×43123401123² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43123401093 and 43123401102.

It is not an unprimeable number, because it can be changed into a prime (43123401121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8268088 + ... + 8273301.

It is an arithmetic number, because the mean of its divisors is an integer number (3969933600).

Almost surely, 2^43123401123 is an apocalyptic number.

43123401123 is a deficient number, since it is larger than the sum of its proper divisors (20395536477).

43123401123 is a wasteful number, since it uses less digits than its factorization.

43123401123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16541482.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 43123401123 its reverse (32110432134), we get a palindrome (75233833257).

The spelling of 43123401123 in words is "forty-three billion, one hundred twenty-three million, four hundred one thousand, one hundred twenty-three".