111020221210 has 16 divisors (see below), whose sum is σ = 206727309000. Its totient is φ = 42876774976.

The previous prime is 111020221183. The next prime is 111020221217. The reversal of 111020221210 is 12122020111.

It can be written as a sum of positive squares in 4 ways, for example, as 102444164761 + 8576056449 = 320069^2 + 92607^2 .

It is not an unprimeable number, because it can be changed into a prime (111020221217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191413885 + ... + 191414464.

Almost surely, 2^111020221210 is an apocalyptic number.

111020221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111020221210 is a deficient number, since it is larger than the sum of its proper divisors (95707087790).

111020221210 is a wasteful number, since it uses less digits than its factorization.

111020221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382828385.

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

Adding to 111020221210 its reverse (12122020111), we get a palindrome (123142241321).

The spelling of 111020221210 in words is "one hundred eleven billion, twenty million, two hundred twenty-one thousand, two hundred ten".