123130313213 has 4 divisors (see below), whose sum is σ = 123138274140. Its totient is φ = 123122352288.

The previous prime is 123130313203. The next prime is 123130313231. The reversal of 123130313213 is 312313031321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312313031321 = 163 ⋅1916030867.

It can be written as a sum of positive squares in 2 ways, for example, as 55715825764 + 67414487449 = 236042^2 + 259643^2 .

It is a cyclic number.

It is not a de Polignac number, because 123130313213 - 2²⁶ = 123063204349 is a prime.

It is a super-2 number, since 2×123130313213² (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 (123130313203) 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, 3957218 + ... + 3988211.

It is an arithmetic number, because the mean of its divisors is an integer number (30784568535).

Almost surely, 2^123130313213 is an apocalyptic number.

It is an amenable number.

123130313213 is a deficient number, since it is larger than the sum of its proper divisors (7960927).

123130313213 is an equidigital number, since it uses as much as digits as its factorization.

123130313213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7960926.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 123130313213 its reverse (312313031321), we get a palindrome (435443344534).

It can be divided in two parts, 12313031321 and 3, that multiplied together give a palindrome (36939093963).

The spelling of 123130313213 in words is "one hundred twenty-three billion, one hundred thirty million, three hundred thirteen thousand, two hundred thirteen".