221111012110 has 16 divisors (see below), whose sum is σ = 418947181200. Its totient is φ = 83789436096.

The previous prime is 221111012081. The next prime is 221111012113. The reversal of 221111012110 is 11210111122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111012113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 581870895 + ... + 581871274.

It is an arithmetic number, because the mean of its divisors is an integer number (26184198825).

Almost surely, 2^221111012110 is an apocalyptic number.

221111012110 is a deficient number, since it is larger than the sum of its proper divisors (197836169090).

221111012110 is a wasteful number, since it uses less digits than its factorization.

221111012110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163742195.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221111012110 its reverse (11210111122), we get a palindrome (232321123232).

It can be divided in two parts, 221111012 and 110, that added together give a palindrome (221111122).

The spelling of 221111012110 in words is "two hundred twenty-one billion, one hundred eleven million, twelve thousand, one hundred ten".