42031221100 has 144 divisors (see below), whose sum is σ = 102124463616. Its totient is φ = 14884128000.

The previous prime is 42031221091. The next prime is 42031221101. The reversal of 42031221100 is 112213024.

It is not an unprimeable number, because it can be changed into a prime (42031221101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10906774 + ... + 10910626.

It is an arithmetic number, because the mean of its divisors is an integer number (709197664).

Almost surely, 2^42031221100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42031221100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51062231808).

42031221100 is an abundant number, since it is smaller than the sum of its proper divisors (60093242516).

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

42031221100 is a wasteful number, since it uses less digits than its factorization.

42031221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 42031221100 its reverse (112213024), we get a palindrome (42143434124).

The spelling of 42031221100 in words is "forty-two billion, thirty-one million, two hundred twenty-one thousand, one hundred".