221020002020 has 48 divisors (see below), whose sum is σ = 481711285440. Its totient is φ = 85081336704.

The previous prime is 221020002019. The next prime is 221020002041. The reversal of 221020002020 is 20200020122.

It is a junction number, because it is equal to n+sod(n) for n = 221020001992 and 221020002010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442574 + ... + 798693.

It is an arithmetic number, because the mean of its divisors is an integer number (10035651780).

Almost surely, 2^221020002020 is an apocalyptic number.

221020002020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221020002020 is an abundant number, since it is smaller than the sum of its proper divisors (260691283420).

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

221020002020 is a wasteful number, since it uses less digits than its factorization.

221020002020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241612 (or 1241610 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 221020002020 its reverse (20200020122), we get a palindrome (241220022142).

The spelling of 221020002020 in words is "two hundred twenty-one billion, twenty million, two thousand, twenty".