123215212443 has 8 divisors (see below), whose sum is σ = 164290064400. Its totient is φ = 82141917728.

The previous prime is 123215212409. The next prime is 123215212489. The reversal of 123215212443 is 344212512321.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 123215212443 - 2¹⁶ = 123215146907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123215212443.

It is not an unprimeable number, because it can be changed into a prime (123215212493) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190128 + ... + 531581.

It is an arithmetic number, because the mean of its divisors is an integer number (20536258050).

Almost surely, 2^123215212443 is an apocalyptic number.

123215212443 is a deficient number, since it is larger than the sum of its proper divisors (41074851957).

123215212443 is an equidigital number, since it uses as much as digits as its factorization.

123215212443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778621.

The product of its digits is 11520, while the sum is 30.

Adding to 123215212443 its reverse (344212512321), we get a palindrome (467427724764).

The spelling of 123215212443 in words is "one hundred twenty-three billion, two hundred fifteen million, two hundred twelve thousand, four hundred forty-three".