42124412321 has 4 divisors (see below), whose sum is σ = 42136212144. Its totient is φ = 42112612500.

The previous prime is 42124412303. The next prime is 42124412333. The reversal of 42124412321 is 12321442124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42124412321 is a prime.

It is a super-2 number, since 2×42124412321² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42124412921) 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 3 ways as a sum of consecutive naturals, for example, 5894555 + ... + 5901696.

It is an arithmetic number, because the mean of its divisors is an integer number (10534053036).

Almost surely, 2^42124412321 is an apocalyptic number.

It is an amenable number.

42124412321 is a deficient number, since it is larger than the sum of its proper divisors (11799823).

42124412321 is a wasteful number, since it uses less digits than its factorization.

42124412321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11799822.

The product of its digits is 3072, while the sum is 26.

Adding to 42124412321 its reverse (12321442124), we get a palindrome (54445854445).

The spelling of 42124412321 in words is "forty-two billion, one hundred twenty-four million, four hundred twelve thousand, three hundred twenty-one".