121312213313 has 4 divisors (see below), whose sum is σ = 122038633920. Its totient is φ = 120585792708.

The previous prime is 121312213307. The next prime is 121312213369. The reversal of 121312213313 is 313312213121.

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 121312213313 - 2²² = 121308019009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121312213303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363210053 + ... + 363210386.

It is an arithmetic number, because the mean of its divisors is an integer number (30509658480).

Almost surely, 2^121312213313 is an apocalyptic number.

It is an amenable number.

121312213313 is a deficient number, since it is larger than the sum of its proper divisors (726420607).

121312213313 is an equidigital number, since it uses as much as digits as its factorization.

121312213313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726420606.

The product of its digits is 648, while the sum is 23.

Adding to 121312213313 its reverse (313312213121), we get a palindrome (434624426434).

The spelling of 121312213313 in words is "one hundred twenty-one billion, three hundred twelve million, two hundred thirteen thousand, three hundred thirteen".