111121220222212 has 12 divisors (see below), whose sum is σ = 194717670394716. Its totient is φ = 55487600109440.

The previous prime is 111121220222203. The next prime is 111121220222213. The reversal of 111121220222212 is 212222022121111.

It can be written as a sum of positive squares in 2 ways, for example, as 12776235276996 + 98344984945216 = 3574386^2 + 9916904^2 .

It is not an unprimeable number, because it can be changed into a prime (111121220222213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18252496993 + ... + 18252503080.

It is an arithmetic number, because the mean of its divisors is an integer number (16226472532893).

Almost surely, 2^{111121220222212} is an apocalyptic number.

It is an amenable number.

111121220222212 is a deficient number, since it is larger than the sum of its proper divisors (83596450172504).

111121220222212 is a wasteful number, since it uses less digits than its factorization.

111121220222212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36505000838 (or 36505000836 counting only the distinct ones).

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

Adding to 111121220222212 its reverse (212222022121111), we get a palindrome (323343242343323).

The spelling of 111121220222212 in words is "one hundred eleven trillion, one hundred twenty-one billion, two hundred twenty million, two hundred twenty-two thousand, two hundred twelve".