121213230317 has 2 divisors, whose sum is σ = 121213230318. Its totient is φ = 121213230316.

The previous prime is 121213230311. The next prime is 121213230331. The reversal of 121213230317 is 713032312121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117028304836 + 4184925481 = 342094^2 + 64691^2 .

It is a cyclic number.

It is not a de Polignac number, because 121213230317 - 2⁴ = 121213230301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121213230311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606615158 + 60606615159.

It is an arithmetic number, because the mean of its divisors is an integer number (60606615159).

Almost surely, 2^121213230317 is an apocalyptic number.

It is an amenable number.

121213230317 is a deficient number, since it is larger than the sum of its proper divisors (1).

121213230317 is an equidigital number, since it uses as much as digits as its factorization.

121213230317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 121213230317 its reverse (713032312121), we get a palindrome (834245542438).

The spelling of 121213230317 in words is "one hundred twenty-one billion, two hundred thirteen million, two hundred thirty thousand, three hundred seventeen".