121212313 has 8 divisors (see below), whose sum is σ = 125885408. Its totient is φ = 116623584.

The previous prime is 121212281. The next prime is 121212317. The reversal of 121212313 is 313212121.

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

It is a cyclic number.

It is not a de Polignac number, because 121212313 - 2⁵ = 121212281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212317) 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, 18156 + ... + 23917.

It is an arithmetic number, because the mean of its divisors is an integer number (15735676).

Almost surely, 2^121212313 is an apocalyptic number.

It is an amenable number.

121212313 is a deficient number, since it is larger than the sum of its proper divisors (4673095).

121212313 is an equidigital number, since it uses as much as digits as its factorization.

121212313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42183.

The product of its digits is 72, while the sum is 16.

The square root of 121212313 is about 11009.6463612597. The cubic root of 121212313 is about 494.8978641771.

Adding to 121212313 its reverse (313212121), we get a palindrome (434424434).

The spelling of 121212313 in words is "one hundred twenty-one million, two hundred twelve thousand, three hundred thirteen".