111221122112210 has 16 divisors (see below), whose sum is σ = 218397839784192. Its totient is φ = 40444044404400.

The previous prime is 111221122112203. The next prime is 111221122112213. The reversal of 111221122112210 is 12211221122111.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (111221122112213) 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, 505550554946 + ... + 505550555165.

It is an arithmetic number, because the mean of its divisors is an integer number (13649864986512).

Almost surely, 2^{111221122112210} is an apocalyptic number.

111221122112210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221122112210 is a deficient number, since it is larger than the sum of its proper divisors (107176717671982).

111221122112210 is a wasteful number, since it uses less digits than its factorization.

111221122112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011101110129.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 111221122112210 its reverse (12211221122111), we get a palindrome (123432343234321).

Subtracting from 111221122112210 its reverse (12211221122111), we obtain a palindrome (99009900990099).

It can be divided in two parts, 1 and 11221122112210, that added together give a palindrome (11221122112211).

The spelling of 111221122112210 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, two hundred ten".