12211222143 has 4 divisors (see below), whose sum is σ = 16281629528. Its totient is φ = 8140814760.

The previous prime is 12211222117. The next prime is 12211222159. The reversal of 12211222143 is 34122211221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 12211222143 - 2¹⁴ = 12211205759 is a prime.

It is a super-2 number, since 2×12211222143² (a number of 21 digits) contains 22 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 (12211422143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2035203688 + ... + 2035203693.

It is an arithmetic number, because the mean of its divisors is an integer number (4070407382).

Almost surely, 2^12211222143 is an apocalyptic number.

12211222143 is a deficient number, since it is larger than the sum of its proper divisors (4070407385).

12211222143 is an equidigital number, since it uses as much as digits as its factorization.

12211222143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070407384.

The product of its digits is 384, while the sum is 21.

Adding to 12211222143 its reverse (34122211221), we get a palindrome (46333433364).

The spelling of 12211222143 in words is "twelve billion, two hundred eleven million, two hundred twenty-two thousand, one hundred forty-three".