221021010020010 has 128 divisors (see below), whose sum is σ = 567491594780160. Its totient is φ = 54896830693376.

The previous prime is 221021010019813. The next prime is 221021010020059. The reversal of 221021010020010 is 10020010120122.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 34695811 + ... + 40568969.

It is an arithmetic number, because the mean of its divisors is an integer number (4433528084220).

Almost surely, 2^{221021010020010} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221021010020010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283745797390080).

221021010020010 is an abundant number, since it is smaller than the sum of its proper divisors (346470584760150).

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

221021010020010 is a wasteful number, since it uses less digits than its factorization.

221021010020010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5873952.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 221021010020010 its reverse (10020010120122), we get a palindrome (231041020140132).

The spelling of 221021010020010 in words is "two hundred twenty-one trillion, twenty-one billion, ten million, twenty thousand, ten".