221330102020 has 12 divisors (see below), whose sum is σ = 464793214284. Its totient is φ = 88532040800.

The previous prime is 221330102009. The next prime is 221330102083. The reversal of 221330102020 is 20201033122.

It can be written as a sum of positive squares in 2 ways, for example, as 41772819456 + 179557282564 = 204384^2 + 423742^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221330101985 and 221330102003.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5533252531 + ... + 5533252570.

It is an arithmetic number, because the mean of its divisors is an integer number (38732767857).

Almost surely, 2^221330102020 is an apocalyptic number.

221330102020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221330102020 is an abundant number, since it is smaller than the sum of its proper divisors (243463112264).

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

221330102020 is a wasteful number, since it uses less digits than its factorization.

221330102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11066505110 (or 11066505108 counting only the distinct ones).

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

Adding to 221330102020 its reverse (20201033122), we get a palindrome (241531135142).

The spelling of 221330102020 in words is "two hundred twenty-one billion, three hundred thirty million, one hundred two thousand, twenty".