221332010020 has 96 divisors (see below), whose sum is σ = 509087690496. Its totient is φ = 80161881600.

The previous prime is 221332009993. The next prime is 221332010023. The reversal of 221332010020 is 20010233122.

It is a junction number, because it is equal to n+sod(n) for n = 221332009976 and 221332010003.

It is not an unprimeable number, because it can be changed into a prime (221332010023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65617054 + ... + 65620426.

It is an arithmetic number, because the mean of its divisors is an integer number (5302996776).

Almost surely, 2^221332010020 is an apocalyptic number.

221332010020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221332010020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254543845248).

221332010020 is an abundant number, since it is smaller than the sum of its proper divisors (287755680476).

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

221332010020 is a wasteful number, since it uses less digits than its factorization.

221332010020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4501 (or 4499 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 221332010020 its reverse (20010233122), we get a palindrome (241342243142).

The spelling of 221332010020 in words is "two hundred twenty-one billion, three hundred thirty-two million, ten thousand, twenty".