123121131313 has 16 divisors (see below), whose sum is σ = 130603596480. Its totient is φ = 115665555456.

The previous prime is 123121131277. The next prime is 123121131359. The reversal of 123121131313 is 313131121321.

It is a cyclic number.

It is not a de Polignac number, because 123121131313 - 2²¹ = 123119034161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123121137313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32578458 + ... + 32582236.

It is an arithmetic number, because the mean of its divisors is an integer number (8162724780).

Almost surely, 2^123121131313 is an apocalyptic number.

It is an amenable number.

123121131313 is a deficient number, since it is larger than the sum of its proper divisors (7482465167).

123121131313 is a wasteful number, since it uses less digits than its factorization.

123121131313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6816.

The product of its digits is 324, while the sum is 22.

Adding to 123121131313 its reverse (313131121321), we get a palindrome (436252252634).

The spelling of 123121131313 in words is "one hundred twenty-three billion, one hundred twenty-one million, one hundred thirty-one thousand, three hundred thirteen".