12121122220993 has 2 divisors, whose sum is σ = 12121122220994. Its totient is φ = 12121122220992.

The previous prime is 12121122220979. The next prime is 12121122221017. The reversal of 12121122220993 is 39902222112121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11689096020624 + 432026200369 = 3418932^2 + 657287^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12121122220993 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121122224993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060561110496 + 6060561110497.

It is an arithmetic number, because the mean of its divisors is an integer number (6060561110497).

Almost surely, 2^{12121122220993} is an apocalyptic number.

It is an amenable number.

12121122220993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121122220993 is an equidigital number, since it uses as much as digits as its factorization.

12121122220993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552, while the sum is 37.

The spelling of 12121122220993 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, nine hundred ninety-three".