12121613393 has 2 divisors, whose sum is σ = 12121613394. Its totient is φ = 12121613392.

The previous prime is 12121613389. The next prime is 12121613419. The reversal of 12121613393 is 39331612121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10475931904 + 1645681489 = 102352^2 + 40567^2 .

It is a cyclic number.

It is not a de Polignac number, because 12121613393 - 2² = 12121613389 is a prime.

It is a super-2 number, since 2×12121613393² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12121613333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060806696 + 6060806697.

It is an arithmetic number, because the mean of its divisors is an integer number (6060806697).

Almost surely, 2^12121613393 is an apocalyptic number.

It is an amenable number.

12121613393 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121613393 is an equidigital number, since it uses as much as digits as its factorization.

12121613393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 32.

The spelling of 12121613393 in words is "twelve billion, one hundred twenty-one million, six hundred thirteen thousand, three hundred ninety-three".