42021221232 has 20 divisors (see below), whose sum is σ = 108554821640. Its totient is φ = 14007073728.

The previous prime is 42021221213. The next prime is 42021221261. The reversal of 42021221232 is 23212212024.

It is a junction number, because it is equal to n+sod(n) for n = 42021221199 and 42021221208.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 437721007 + ... + 437721102.

It is an arithmetic number, because the mean of its divisors is an integer number (5427741082).

Almost surely, 2^42021221232 is an apocalyptic number.

It is an amenable number.

42021221232 is an abundant number, since it is smaller than the sum of its proper divisors (66533600408).

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

42021221232 is a wasteful number, since it uses less digits than its factorization.

42021221232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875442120 (or 875442114 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 42021221232 its reverse (23212212024), we get a palindrome (65233433256).

The spelling of 42021221232 in words is "forty-two billion, twenty-one million, two hundred twenty-one thousand, two hundred thirty-two".