12111222142 has 8 divisors (see below), whose sum is σ = 18609926832. Its totient is φ = 5907913200.

The previous prime is 12111222113. The next prime is 12111222163. The reversal of 12111222142 is 24122211121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73848834 + ... + 73848997.

It is an arithmetic number, because the mean of its divisors is an integer number (2326240854).

Almost surely, 2^12111222142 is an apocalyptic number.

12111222142 is a deficient number, since it is larger than the sum of its proper divisors (6498704690).

12111222142 is a wasteful number, since it uses less digits than its factorization.

12111222142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147697874.

The product of its digits is 128, while the sum is 19.

Adding to 12111222142 its reverse (24122211121), we get a palindrome (36233433263).

The spelling of 12111222142 in words is "twelve billion, one hundred eleven million, two hundred twenty-two thousand, one hundred forty-two".