111401082 has 80 divisors (see below), whose sum is σ = 271277160. Its totient is φ = 34167744.

The previous prime is 111401057. The next prime is 111401083. The reversal of 111401082 is 280104111.

It can be written as a sum of positive squares in 4 ways, for example, as 2595321 + 108805761 = 1611^2 + 10431^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111401083) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 355758 + ... + 356070.

Almost surely, 2^111401082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111401082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135638580).

111401082 is an abundant number, since it is smaller than the sum of its proper divisors (159876078).

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

111401082 is an equidigital number, since it uses as much as digits as its factorization.

111401082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 111401082 is about 10554.6710986179. The cubic root of 111401082 is about 481.1677038791.

Adding to 111401082 its reverse (280104111), we get a palindrome (391505193).

The spelling of 111401082 in words is "one hundred eleven million, four hundred one thousand, eighty-two".