221002202020 has 12 divisors (see below), whose sum is σ = 464104624284. Its totient is φ = 88400880800.

The previous prime is 221002202009. The next prime is 221002202053. The reversal of 221002202020 is 20202200122.

It can be written as a sum of positive squares in 2 ways, for example, as 168119680576 + 52882521444 = 410024^2 + 229962^2 .

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, 5525055031 + ... + 5525055070.

It is an arithmetic number, because the mean of its divisors is an integer number (38675385357).

Almost surely, 2^221002202020 is an apocalyptic number.

221002202020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221002202020 is an abundant number, since it is smaller than the sum of its proper divisors (243102422264).

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

221002202020 is a wasteful number, since it uses less digits than its factorization.

221002202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11050110110 (or 11050110108 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 221002202020 its reverse (20202200122), we get a palindrome (241204402142).

The spelling of 221002202020 in words is "two hundred twenty-one billion, two million, two hundred two thousand, twenty".