42040221012 has 36 divisors (see below), whose sum is σ = 107320507476. Its totient is φ = 13874659200.

The previous prime is 42040220921. The next prime is 42040221059. The reversal of 42040221012 is 21012204024.

42040221012 is a `hidden beast` number, since 42 + 0 + 402 + 210 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30420243396 + 11619977616 = 174414^2 + 107796^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 5777473 + ... + 5784744.

Almost surely, 2^42040221012 is an apocalyptic number.

It is an amenable number.

42040221012 is an abundant number, since it is smaller than the sum of its proper divisors (65280286464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42040221012 is a wasteful number, since it uses less digits than its factorization.

42040221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11562328 (or 11562323 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 42040221012 its reverse (21012204024), we get a palindrome (63052425036).

The spelling of 42040221012 in words is "forty-two billion, forty million, two hundred twenty-one thousand, twelve".