111221121100210 has 48 divisors (see below), whose sum is σ = 220055543237376. Its totient is φ = 40443460244000.

The previous prime is 111221121100183. The next prime is 111221121100241. The reversal of 111221121100210 is 12001121122111.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88103775 + ... + 89357245.

It is an arithmetic number, because the mean of its divisors is an integer number (4584490484112).

Almost surely, 2^{111221121100210} is an apocalyptic number.

111221121100210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111221121100210 is a deficient number, since it is larger than the sum of its proper divisors (108834422137166).

111221121100210 is a wasteful number, since it uses less digits than its factorization.

111221121100210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326831 (or 1326820 counting only the distinct ones).

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

Adding to 111221121100210 its reverse (12001121122111), we get a palindrome (123222242222321).

The spelling of 111221121100210 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred ten".