420331231100 has 144 divisors (see below), whose sum is σ = 1011400266240. Its totient is φ = 150350476800.

The previous prime is 420331231081. The next prime is 420331231121. The reversal of 420331231100 is 1132133024.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21263021 + ... + 21282779.

It is an arithmetic number, because the mean of its divisors is an integer number (7023612960).

Almost surely, 2^420331231100 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 420331231100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (505700133120).

420331231100 is an abundant number, since it is smaller than the sum of its proper divisors (591069035140).

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

420331231100 is a wasteful number, since it uses less digits than its factorization.

420331231100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20100 (or 20093 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 420331231100 its reverse (1132133024), we get a palindrome (421463364124).

The spelling of 420331231100 in words is "four hundred twenty billion, three hundred thirty-one million, two hundred thirty-one thousand, one hundred".