10000221020 has 24 divisors (see below), whose sum is σ = 21447284544. Its totient is φ = 3914979776.

The previous prime is 10000220983. The next prime is 10000221029. The reversal of 10000221020 is 2012200001.

It is a junction number, because it is equal to n+sod(n) for n = 10000220989 and 10000221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000221029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5318327 + ... + 5320206.

It is an arithmetic number, because the mean of its divisors is an integer number (893636856).

Almost surely, 2^10000221020 is an apocalyptic number.

10000221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10000221020 is an abundant number, since it is smaller than the sum of its proper divisors (11447063524).

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

10000221020 is a wasteful number, since it uses less digits than its factorization.

10000221020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10638589 (or 10638587 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

Adding to 10000221020 its reverse (2012200001), we get a palindrome (12012421021).

The spelling of 10000221020 in words is "ten billion, two hundred twenty-one thousand, twenty".