12111445242 has 128 divisors (see below), whose sum is σ = 30101944320. Its totient is φ = 3584424960.

The previous prime is 12111445237. The next prime is 12111445243. The reversal of 12111445242 is 24254411121.

12111445242 is a `hidden beast` number, since 1 + 21 + 114 + 4 + 524 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12111445243) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3763218 + ... + 3766434.

It is an arithmetic number, because the mean of its divisors is an integer number (235171440).

Almost surely, 2^12111445242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12111445242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15050972160).

12111445242 is an abundant number, since it is smaller than the sum of its proper divisors (17990499078).

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

12111445242 is a wasteful number, since it uses less digits than its factorization.

12111445242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445 (or 3439 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

Adding to 12111445242 its reverse (24254411121), we get a palindrome (36365856363).

The spelling of 12111445242 in words is "twelve billion, one hundred eleven million, four hundred forty-five thousand, two hundred forty-two".