123443124213 has 4 divisors (see below), whose sum is σ = 164590832288. Its totient is φ = 82295416140.

The previous prime is 123443124209. The next prime is 123443124227. The reversal of 123443124213 is 312421344321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312421344321 = 3 ⋅104140448107.

It is not a de Polignac number, because 123443124213 - 2² = 123443124209 is a prime.

It is a super-2 number, since 2×123443124213² (a number of 23 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 (123443124713) 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, 20573854033 + ... + 20573854038.

It is an arithmetic number, because the mean of its divisors is an integer number (41147708072).

Almost surely, 2^123443124213 is an apocalyptic number.

It is an amenable number.

123443124213 is a deficient number, since it is larger than the sum of its proper divisors (41147708075).

123443124213 is an equidigital number, since it uses as much as digits as its factorization.

123443124213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41147708074.

The product of its digits is 13824, while the sum is 30.

Adding to 123443124213 its reverse (312421344321), we get a palindrome (435864468534).

The spelling of 123443124213 in words is "one hundred twenty-three billion, four hundred forty-three million, one hundred twenty-four thousand, two hundred thirteen".