221110200010021 has 24 divisors (see below), whose sum is σ = 259491408554880. Its totient is φ = 187841931080832.

The previous prime is 221110200010019. The next prime is 221110200010097. The reversal of 221110200010021 is 120010002011122.

It is not a de Polignac number, because 221110200010021 - 2¹ = 221110200010019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221110200009983 and 221110200010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110200050021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283697700 + ... + 284476018.

It is an arithmetic number, because the mean of its divisors is an integer number (10812142023120).

Almost surely, 2^{221110200010021} is an apocalyptic number.

It is an amenable number.

221110200010021 is a deficient number, since it is larger than the sum of its proper divisors (38381208544859).

221110200010021 is a wasteful number, since it uses less digits than its factorization.

221110200010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829753 (or 829746 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221110200010021 its reverse (120010002011122), we get a palindrome (341120202021143).

The spelling of 221110200010021 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred million, ten thousand, twenty-one".