111321420 has 96 divisors (see below), whose sum is σ = 358041600. Its totient is φ = 25315584.

The previous prime is 111321407. The next prime is 111321421. The reversal of 111321420 is 24123111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111321420.

It is not an unprimeable number, because it can be changed into a prime (111321421) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 99826 + ... + 100934.

It is an arithmetic number, because the mean of its divisors is an integer number (3729600).

Almost surely, 2^111321420 is an apocalyptic number.

111321420 is a gapful number since it is divisible by the number (10) 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 111321420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179020800).

111321420 is an abundant number, since it is smaller than the sum of its proper divisors (246720180).

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

111321420 is a wasteful number, since it uses less digits than its factorization.

111321420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1365 counting only the distinct ones).

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

The square root of 111321420 is about 10550.8966443616. The cubic root of 111321420 is about 481.0529835034.

Adding to 111321420 its reverse (24123111), we get a palindrome (135444531).

The spelling of 111321420 in words is "one hundred eleven million, three hundred twenty-one thousand, four hundred twenty".