111220221221210 has 32 divisors (see below), whose sum is σ = 201403317144960. Its totient is φ = 44219905808832.

The previous prime is 111220221221173. The next prime is 111220221221251. The reversal of 111220221221210 is 12122122022111.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40381832 + ... + 43048028.

It is an arithmetic number, because the mean of its divisors is an integer number (6293853660780).

Almost surely, 2^{111220221221210} is an apocalyptic number.

111220221221210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111220221221210 is a deficient number, since it is larger than the sum of its proper divisors (90183095923750).

111220221221210 is a wasteful number, since it uses less digits than its factorization.

111220221221210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691350.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 111220221221210 its reverse (12122122022111), we get a palindrome (123342343243321).

The spelling of 111220221221210 in words is "one hundred eleven trillion, two hundred twenty billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred ten".