111120121212 has 24 divisors (see below), whose sum is σ = 259380347856. Its totient is φ = 37025745408.

The previous prime is 111120121207. The next prime is 111120121243. The reversal of 111120121212 is 212121021111.

It is a happy number.

111120121212 is a modest number, since divided by 121212 gives 111120 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 111120121191 and 111120121200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1754463 + ... + 1816694.

It is an arithmetic number, because the mean of its divisors is an integer number (10807514494).

Almost surely, 2^111120121212 is an apocalyptic number.

111120121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

111120121212 is an abundant number, since it is smaller than the sum of its proper divisors (148260226644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111120121212 is a wasteful number, since it uses less digits than its factorization.

111120121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573757 (or 3573755 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111120121212 its reverse (212121021111), we get a palindrome (323241142323).

The spelling of 111120121212 in words is "one hundred eleven billion, one hundred twenty million, one hundred twenty-one thousand, two hundred twelve".