123223520213 has 4 divisors (see below), whose sum is σ = 123224306220. Its totient is φ = 123222734208.

The previous prime is 123223520197. The next prime is 123223520261. The reversal of 123223520213 is 312025322321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 79522872004 + 43700648209 = 281998^2 + 209047^2 .

It is a cyclic number.

It is not a de Polignac number, because 123223520213 - 2⁴ = 123223520197 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 (123223520513) 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, 68570 + ... + 501147.

It is an arithmetic number, because the mean of its divisors is an integer number (30806076555).

Almost surely, 2^123223520213 is an apocalyptic number.

It is an amenable number.

123223520213 is a deficient number, since it is larger than the sum of its proper divisors (786007).

123223520213 is an equidigital number, since it uses as much as digits as its factorization.

123223520213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786006.

The product of its (nonzero) digits is 4320, while the sum is 26.

Adding to 123223520213 its reverse (312025322321), we get a palindrome (435248842534).

The spelling of 123223520213 in words is "one hundred twenty-three billion, two hundred twenty-three million, five hundred twenty thousand, two hundred thirteen".