221021201110 has 16 divisors (see below), whose sum is σ = 398534911632. Its totient is φ = 88253647200.

The previous prime is 221021201059. The next prime is 221021201111. The reversal of 221021201110 is 11102120122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021201111) 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 7 ways as a sum of consecutive naturals, for example, 19348161 + ... + 19359580.

It is an arithmetic number, because the mean of its divisors is an integer number (24908431977).

Almost surely, 2^221021201110 is an apocalyptic number.

221021201110 is a deficient number, since it is larger than the sum of its proper divisors (177513710522).

221021201110 is a wasteful number, since it uses less digits than its factorization.

221021201110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38708319.

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

Adding to 221021201110 its reverse (11102120122), we get a palindrome (232123321232).

The spelling of 221021201110 in words is "two hundred twenty-one billion, twenty-one million, two hundred one thousand, one hundred ten".