123121313 has 8 divisors (see below), whose sum is σ = 142692480. Its totient is φ = 104045760.

The previous prime is 123121309. The next prime is 123121333. The reversal of 123121313 is 313121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123121313 - 2² = 123121309 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 123121291 and 123121300.

It is not an unprimeable number, because it can be changed into a prime (123121303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123368 + ... + 124361.

It is an arithmetic number, because the mean of its divisors is an integer number (17836560).

Almost surely, 2^123121313 is an apocalyptic number.

It is an amenable number.

123121313 is a deficient number, since it is larger than the sum of its proper divisors (19571167).

123121313 is an equidigital number, since it uses as much as digits as its factorization.

123121313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247807.

The product of its digits is 108, while the sum is 17.

The square root of 123121313 is about 11096.0043709436. The cubic root of 123121313 is about 497.4824289477.

Adding to 123121313 its reverse (313121321), we get a palindrome (436242634).

The spelling of 123121313 in words is "one hundred twenty-three million, one hundred twenty-one thousand, three hundred thirteen".