221021000010 has 48 divisors (see below), whose sum is σ = 577865003040. Its totient is φ = 58609661280.

The previous prime is 221020999973. The next prime is 221021000021. The reversal of 221021000010 is 10000120122.

221021000010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 221020999956 and 221021000001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6843636 + ... + 6875855.

It is an arithmetic number, because the mean of its divisors is an integer number (12038854230).

Almost surely, 2^221021000010 is an apocalyptic number.

221021000010 is an abundant number, since it is smaller than the sum of its proper divisors (356844003030).

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

221021000010 is a wasteful number, since it uses less digits than its factorization.

221021000010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13719683 (or 13719680 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 221021000010 its reverse (10000120122), we get a palindrome (231021120132).

The spelling of 221021000010 in words is "two hundred twenty-one billion, twenty-one million, ten", and thus it is an aban number.