221012110 has 32 divisors (see below), whose sum is σ = 434678400. Its totient is φ = 80240160.

The previous prime is 221012081. The next prime is 221012111. The reversal of 221012110 is 11210122.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221012111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93321 + ... + 95659.

It is an arithmetic number, because the mean of its divisors is an integer number (13583700).

Almost surely, 2^221012110 is an apocalyptic number.

221012110 is a deficient number, since it is larger than the sum of its proper divisors (213666290).

221012110 is a wasteful number, since it uses less digits than its factorization.

221012110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3216.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 221012110 is about 14866.4760451157. The cubic root of 221012110 is about 604.6054025937.

Adding to 221012110 its reverse (11210122), we get a palindrome (232222232).

It can be divided in two parts, 221012 and 110, that added together give a palindrome (221122).

The spelling of 221012110 in words is "two hundred twenty-one million, twelve thousand, one hundred ten".