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12111120 = 24355789

12111120 has 240 divisors, whose sum is σ = 48746880. Its totient is φ = 2737152.

The previous prime is 12111103. The next prime is 12111139. The reversal of 12111120 is 2111121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a zygodrome in base 6.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 136036 + ... + 136124.

It is an arithmetic number, because the mean of its divisors is an integer number (203112).

Almost surely, 212111120 is an apocalyptic number.

12111120 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 12111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24373440).

12111120 is an abundant number, since it is smaller than the sum of its proper divisors (36635760).

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

12111120 is an equidigital number, since it uses as much as digits as its factorization.

12111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 12111120 is about 3480.1034467383. The cubic root of 12111120 is about 229.6473486667.

Adding to 12111120 its reverse (2111121), we get a palindrome (14222241).

Subtracting from 12111120 its reverse (2111121), we obtain a palindrome (9999999).

The spelling of 12111120 in words is "twelve million, one hundred eleven thousand, one hundred twenty".