111420312 has 64 divisors (see below), whose sum is σ = 296161920. Its totient is φ = 34810368.

The previous prime is 111420307. The next prime is 111420341. The reversal of 111420312 is 213024111.

It is a junction number, because it is equal to n+sod(n) for n = 111420291 and 111420300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141183 + ... + 141969.

It is an arithmetic number, because the mean of its divisors is an integer number (4627530).

Almost surely, 2^111420312 is an apocalyptic number.

111420312 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 111420312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148080960).

111420312 is an abundant number, since it is smaller than the sum of its proper divisors (184741608).

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

111420312 is a wasteful number, since it uses less digits than its factorization.

111420312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 111420312 is about 10555.5820303762. The cubic root of 111420312 is about 481.1953885970.

Adding to 111420312 its reverse (213024111), we get a palindrome (324444423).

The spelling of 111420312 in words is "one hundred eleven million, four hundred twenty thousand, three hundred twelve".