121212316013 has 2 divisors, whose sum is σ = 121212316014. Its totient is φ = 121212316012.

The previous prime is 121212315997. The next prime is 121212316033. The reversal of 121212316013 is 310613212121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84226487524 + 36985828489 = 290218^2 + 192317^2 .

It is an emirp because it is prime and its reverse (310613212121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121212316013 - 2⁴ = 121212315997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121212316013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121212316033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606158006 + 60606158007.

It is an arithmetic number, because the mean of its divisors is an integer number (60606158007).

Almost surely, 2^121212316013 is an apocalyptic number.

It is an amenable number.

121212316013 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212316013 is an equidigital number, since it uses as much as digits as its factorization.

121212316013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 121212316013 its reverse (310613212121), we get a palindrome (431825528134).

The spelling of 121212316013 in words is "one hundred twenty-one billion, two hundred twelve million, three hundred sixteen thousand, thirteen".