111221022221212 has 24 divisors (see below), whose sum is σ = 206433543054816. Its totient is φ = 52251042659328.

The previous prime is 111221022221209. The next prime is 111221022221251. The reversal of 111221022221212 is 212122220122111.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1379051808 + ... + 1379132455.

It is an arithmetic number, because the mean of its divisors is an integer number (8601397627284).

Almost surely, 2^{111221022221212} is an apocalyptic number.

It is an amenable number.

111221022221212 is a deficient number, since it is larger than the sum of its proper divisors (95212520833604).

111221022221212 is a wasteful number, since it uses less digits than its factorization.

111221022221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758184877 (or 2758184875 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 111221022221212 its reverse (212122220122111), we get a palindrome (323343242343323).

The spelling of 111221022221212 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred twelve".