221210020101 has 16 divisors (see below), whose sum is σ = 337744195200. Its totient is φ = 126157378368.

The previous prime is 221210020099. The next prime is 221210020121. The reversal of 221210020101 is 101020012122.

It is not a de Polignac number, because 221210020101 - 2¹ = 221210020099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221210020121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10336866 + ... + 10358243.

It is an arithmetic number, because the mean of its divisors is an integer number (21109012200).

Almost surely, 2^221210020101 is an apocalyptic number.

221210020101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

221210020101 is a deficient number, since it is larger than the sum of its proper divisors (116534175099).

221210020101 is a wasteful number, since it uses less digits than its factorization.

221210020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20695628.

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

Adding to 221210020101 its reverse (101020012122), we get a palindrome (322230032223).

The spelling of 221210020101 in words is "two hundred twenty-one billion, two hundred ten million, twenty thousand, one hundred one".