121213302313 has 4 divisors (see below), whose sum is σ = 122575249620. Its totient is φ = 119851355008.

The previous prime is 121213302311. The next prime is 121213302323. The reversal of 121213302313 is 313203312121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20732544144 + 100480758169 = 143988^2 + 316987^2 .

It is a cyclic number.

It is not a de Polignac number, because 121213302313 - 2¹ = 121213302311 is a prime.

It is a super-2 number, since 2×121213302313² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121213302311) 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, 680973520 + ... + 680973697.

It is an arithmetic number, because the mean of its divisors is an integer number (30643812405).

Almost surely, 2^121213302313 is an apocalyptic number.

It is an amenable number.

121213302313 is a deficient number, since it is larger than the sum of its proper divisors (1361947307).

121213302313 is an equidigital number, since it uses as much as digits as its factorization.

121213302313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361947306.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 121213302313 its reverse (313203312121), we get a palindrome (434416614434).

The spelling of 121213302313 in words is "one hundred twenty-one billion, two hundred thirteen million, three hundred two thousand, three hundred thirteen".