123241021213 has 4 divisors (see below), whose sum is σ = 123241857948. Its totient is φ = 123240184480.

The previous prime is 123241021193. The next prime is 123241021217. The reversal of 123241021213 is 312120142321.

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 62686639129 + 60554382084 = 250373^2 + 246078^2 .

It is a cyclic number.

It is not a de Polignac number, because 123241021213 - 2⁵ = 123241021181 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 (123241021217) 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, 132178 + ... + 513763.

It is an arithmetic number, because the mean of its divisors is an integer number (30810464487).

Almost surely, 2^123241021213 is an apocalyptic number.

It is an amenable number.

123241021213 is a deficient number, since it is larger than the sum of its proper divisors (836735).

123241021213 is an equidigital number, since it uses as much as digits as its factorization.

123241021213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 836734.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 123241021213 its reverse (312120142321), we get a palindrome (435361163534).

The spelling of 123241021213 in words is "one hundred twenty-three billion, two hundred forty-one million, twenty-one thousand, two hundred thirteen".