42012310221 has 24 divisors (see below), whose sum is σ = 70027002240. Its totient is φ = 23773952736.

The previous prime is 42012310211. The next prime is 42012310243. The reversal of 42012310221 is 12201321024.

It is a happy number.

42012310221 is a `hidden beast` number, since 420 + 1 + 23 + 1 + 0 + 221 = 666.

It is not a de Polignac number, because 42012310221 - 2⁵ = 42012310189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42012310194 and 42012310203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42012310201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3230706 + ... + 3243683.

It is an arithmetic number, because the mean of its divisors is an integer number (2917791760).

Almost surely, 2^42012310221 is an apocalyptic number.

It is an amenable number.

42012310221 is a deficient number, since it is larger than the sum of its proper divisors (28014692019).

42012310221 is a wasteful number, since it uses less digits than its factorization.

42012310221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6474505 (or 6474502 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 42012310221 its reverse (12201321024), we get a palindrome (54213631245).

The spelling of 42012310221 in words is "forty-two billion, twelve million, three hundred ten thousand, two hundred twenty-one".