221133020020 has 36 divisors (see below), whose sum is σ = 510433497252. Its totient is φ = 80412006400.

The previous prime is 221133019993. The next prime is 221133020041. The reversal of 221133020020 is 20020331122.

It can be written as a sum of positive squares in 2 ways, for example, as 156711473424 + 64421546596 = 395868^2 + 253814^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221133019976 and 221133020003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45686221 + ... + 45691060.

It is an arithmetic number, because the mean of its divisors is an integer number (14178708257).

Almost surely, 2^221133020020 is an apocalyptic number.

221133020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221133020020 is an abundant number, since it is smaller than the sum of its proper divisors (289300477232).

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

221133020020 is a wasteful number, since it uses less digits than its factorization.

221133020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91377312 (or 91377299 counting only the distinct ones).

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

Adding to 221133020020 its reverse (20020331122), we get a palindrome (241153351142).

The spelling of 221133020020 in words is "two hundred twenty-one billion, one hundred thirty-three million, twenty thousand, twenty".