12111222143 has 4 divisors (see below), whose sum is σ = 12228806928. Its totient is φ = 11993637360.

The previous prime is 12111222113. The next prime is 12111222163. The reversal of 12111222143 is 34122211121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34122211121 = 35983 ⋅948287.

It is a cyclic number.

It is not a de Polignac number, because 12111222143 - 2³⁰ = 11037480319 is a prime.

It is a super-3 number, since 3×12111222143³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111222113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58792238 + ... + 58792443.

It is an arithmetic number, because the mean of its divisors is an integer number (3057201732).

Almost surely, 2^12111222143 is an apocalyptic number.

12111222143 is a deficient number, since it is larger than the sum of its proper divisors (117584785).

12111222143 is a wasteful number, since it uses less digits than its factorization.

12111222143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117584784.

The product of its digits is 192, while the sum is 20.

Adding to 12111222143 its reverse (34122211121), we get a palindrome (46233433264).

The spelling of 12111222143 in words is "twelve billion, one hundred eleven million, two hundred twenty-two thousand, one hundred forty-three".