42124420231 has 4 divisors (see below), whose sum is σ = 44341495000. Its totient is φ = 39907345464.

The previous prime is 42124420229. The next prime is 42124420243. The reversal of 42124420231 is 13202442124.

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 42124420231 - 2¹ = 42124420229 is a prime.

It is a super-2 number, since 2×42124420231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42124420196 and 42124420205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42124420201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1108537356 + ... + 1108537393.

It is an arithmetic number, because the mean of its divisors is an integer number (11085373750).

Almost surely, 2^42124420231 is an apocalyptic number.

42124420231 is a deficient number, since it is larger than the sum of its proper divisors (2217074769).

42124420231 is a wasteful number, since it uses less digits than its factorization.

42124420231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2217074768.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 42124420231 its reverse (13202442124), we get a palindrome (55326862355).

The spelling of 42124420231 in words is "forty-two billion, one hundred twenty-four million, four hundred twenty thousand, two hundred thirty-one".