221010020021000 has 256 divisors, whose sum is σ = 628568184291840. Its totient is φ = 71003336294400.

The previous prime is 221010020020991. The next prime is 221010020021053. The reversal of 221010020021000 is 120020010122.

It is a happy number.

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, 22922192 + ... + 31103808.

It is an arithmetic number, because the mean of its divisors is an integer number (2455344469890).

Almost surely, 2^{221010020021000} is an apocalyptic number.

221010020021000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221010020021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314284092145920).

221010020021000 is an abundant number, since it is smaller than the sum of its proper divisors (407558164270840).

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

221010020021000 is a wasteful number, since it uses less digits than its factorization.

221010020021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8181889 (or 8181875 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221010020021000 its reverse (120020010122), we get a palindrome (221130040031122).

The spelling of 221010020021000 in words is "two hundred twenty-one trillion, ten billion, twenty million, twenty-one thousand".