123131310213 has 16 divisors (see below), whose sum is σ = 168622623936. Its totient is φ = 79864041600.

The previous prime is 123131310191. The next prime is 123131310283. The reversal of 123131310213 is 312013131321.

It is a happy number.

It is not a de Polignac number, because 123131310213 - 2⁸ = 123131309957 is a prime.

It is a super-2 number, since 2×123131310213² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123131310213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131310283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2935438 + ... + 2977088.

It is an arithmetic number, because the mean of its divisors is an integer number (10538913996).

Almost surely, 2^123131310213 is an apocalyptic number.

It is an amenable number.

123131310213 is a deficient number, since it is larger than the sum of its proper divisors (45491313723).

123131310213 is a wasteful number, since it uses less digits than its factorization.

123131310213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68324.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123131310213 its reverse (312013131321), we get a palindrome (435144441534).

The spelling of 123131310213 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred ten thousand, two hundred thirteen".