121313213 has 4 divisors (see below), whose sum is σ = 138643680. Its totient is φ = 103982748.

The previous prime is 121313197. The next prime is 121313243. The reversal of 121313213 is 312313121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121313213 - 2⁴ = 121313197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121313191 and 121313200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121313243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8665223 + ... + 8665236.

It is an arithmetic number, because the mean of its divisors is an integer number (34660920).

Almost surely, 2^121313213 is an apocalyptic number.

It is an amenable number.

121313213 is a deficient number, since it is larger than the sum of its proper divisors (17330467).

121313213 is an equidigital number, since it uses as much as digits as its factorization.

121313213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17330466.

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

The square root of 121313213 is about 11014.2277532290. The cubic root of 121313213 is about 495.0351476590.

Adding to 121313213 its reverse (312313121), we get a palindrome (433626334).

The spelling of 121313213 in words is "one hundred twenty-one million, three hundred thirteen thousand, two hundred thirteen".