111021612 has 48 divisors (see below), whose sum is σ = 282828000. Its totient is φ = 33689088.

The previous prime is 111021593. The next prime is 111021619. The reversal of 111021612 is 216120111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111021591 and 111021600.

It is not an unprimeable number, because it can be changed into a prime (111021619) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 6514 + ... + 16262.

It is an arithmetic number, because the mean of its divisors is an integer number (5892250).

Almost surely, 2^111021612 is an apocalyptic number.

111021612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111021612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141414000).

111021612 is an abundant number, since it is smaller than the sum of its proper divisors (171806388).

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

111021612 is a wasteful number, since it uses less digits than its factorization.

111021612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9842 (or 9840 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 111021612 is about 10536.6793630631. The cubic root of 111021612 is about 480.6207420414.

Adding to 111021612 its reverse (216120111), we get a palindrome (327141723).

It can be divided in two parts, 1110 and 21612, that added together give a palindrome (22722).

The spelling of 111021612 in words is "one hundred eleven million, twenty-one thousand, six hundred twelve".