3123321020213 has 4 divisors (see below), whose sum is σ = 3123327952908. Its totient is φ = 3123314087520.

The previous prime is 3123321020189. The next prime is 3123321020221. The reversal of 3123321020213 is 3120201233213.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2270862135844 + 852458884369 = 1506938^2 + 923287^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123321020213 - 2²⁴ = 3123304242997 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 (3123321020233) 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, 2739806 + ... + 3708527.

It is an arithmetic number, because the mean of its divisors is an integer number (780831988227).

Almost surely, 2^{3123321020213} is an apocalyptic number.

It is an amenable number.

3123321020213 is a deficient number, since it is larger than the sum of its proper divisors (6932695).

3123321020213 is an equidigital number, since it uses as much as digits as its factorization.

3123321020213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6932694.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 3123321020213 its reverse (3120201233213), we get a palindrome (6243522253426).

The spelling of 3123321020213 in words is "three trillion, one hundred twenty-three billion, three hundred twenty-one million, twenty thousand, two hundred thirteen".