12111111342 has 24 divisors (see below), whose sum is σ = 28626263640. Its totient is φ = 3670033680.

The previous prime is 12111111323. The next prime is 12111111361. The reversal of 12111111342 is 24311111121.

12111111342 is a `hidden beast` number, since 1 + 211 + 1 + 111 + 342 = 666.

12111111342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (12111111323) and next prime (12111111361).

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30583417 + ... + 30583812.

It is an arithmetic number, because the mean of its divisors is an integer number (1192760985).

Almost surely, 2^12111111342 is an apocalyptic number.

12111111342 is an abundant number, since it is smaller than the sum of its proper divisors (16515152298).

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

12111111342 is a wasteful number, since it uses less digits than its factorization.

12111111342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61167248 (or 61167245 counting only the distinct ones).

The product of its digits is 48, while the sum is 18.

Adding to 12111111342 its reverse (24311111121), we get a palindrome (36422222463).

The spelling of 12111111342 in words is "twelve billion, one hundred eleven million, one hundred eleven thousand, three hundred forty-two".