111021212 has 12 divisors (see below), whose sum is σ = 194810616. Its totient is φ = 55361040.

The previous prime is 111021151. The next prime is 111021223. The reversal of 111021212 is 212120111.

It is a junction number, because it is equal to n+sod(n) for n = 111021193 and 111021202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35714 + ... + 38697.

It is an arithmetic number, because the mean of its divisors is an integer number (16234218).

Almost surely, 2^111021212 is an apocalyptic number.

It is an amenable number.

111021212 is a deficient number, since it is larger than the sum of its proper divisors (83789404).

111021212 is a wasteful number, since it uses less digits than its factorization.

111021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74788 (or 74786 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 111021212 is about 10536.6603817339. The cubic root of 111021212 is about 480.6201648309.

Adding to 111021212 its reverse (212120111), we get a palindrome (323141323).

It can be divided in two parts, 1110 and 21212, that added together give a palindrome (22322).

The spelling of 111021212 in words is "one hundred eleven million, twenty-one thousand, two hundred twelve".