12212143423 has 4 divisors (see below), whose sum is σ = 12242598048. Its totient is φ = 12181688800.

The previous prime is 12212143393. The next prime is 12212143469. The reversal of 12212143423 is 32434121221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32434121221 = 233 ⋅139202237.

It is a cyclic number.

It is not a de Polignac number, because 12212143423 - 2²⁵ = 12178588991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12212143123) 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, 15226711 + ... + 15227512.

It is an arithmetic number, because the mean of its divisors is an integer number (3060649512).

Almost surely, 2^12212143423 is an apocalyptic number.

12212143423 is a deficient number, since it is larger than the sum of its proper divisors (30454625).

12212143423 is an equidigital number, since it uses as much as digits as its factorization.

12212143423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30454624.

The product of its digits is 2304, while the sum is 25.

Adding to 12212143423 its reverse (32434121221), we get a palindrome (44646264644).

The spelling of 12212143423 in words is "twelve billion, two hundred twelve million, one hundred forty-three thousand, four hundred twenty-three".