111220021210 has 32 divisors (see below), whose sum is σ = 204792883200. Its totient is φ = 43469611392.

The previous prime is 111220021177. The next prime is 111220021219. The reversal of 111220021210 is 12120022111.

It is not an unprimeable number, because it can be changed into a prime (111220021219) 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 15 ways as a sum of consecutive naturals, for example, 90366 + ... + 480214.

It is an arithmetic number, because the mean of its divisors is an integer number (6399777600).

Almost surely, 2^111220021210 is an apocalyptic number.

111220021210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111220021210 is a deficient number, since it is larger than the sum of its proper divisors (93572861990).

111220021210 is a wasteful number, since it uses less digits than its factorization.

111220021210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390510.

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

Adding to 111220021210 its reverse (12120022111), we get a palindrome (123340043321).

Subtracting from 111220021210 its reverse (12120022111), we obtain a palindrome (99099999099).

The spelling of 111220021210 in words is "one hundred eleven billion, two hundred twenty million, twenty-one thousand, two hundred ten".