42401233123 has 4 divisors (see below), whose sum is σ = 43863344640. Its totient is φ = 40939121608.

The previous prime is 42401233073. The next prime is 42401233187. The reversal of 42401233123 is 32133210424.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42401233123 - 2²¹ = 42399135971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42401233423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 731055715 + ... + 731055772.

It is an arithmetic number, because the mean of its divisors is an integer number (10965836160).

Almost surely, 2^42401233123 is an apocalyptic number.

42401233123 is a deficient number, since it is larger than the sum of its proper divisors (1462111517).

42401233123 is a wasteful number, since it uses less digits than its factorization.

42401233123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462111516.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 42401233123 its reverse (32133210424), we get a palindrome (74534443547).

The spelling of 42401233123 in words is "forty-two billion, four hundred one million, two hundred thirty-three thousand, one hundred twenty-three".