121600091993 has 2 divisors, whose sum is σ = 121600091994. Its totient is φ = 121600091992.

The previous prime is 121600091989. The next prime is 121600092037. The reversal of 121600091993 is 399190006121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 120664527424 + 935564569 = 347368^2 + 30587^2 .

It is a cyclic number.

It is not a de Polignac number, because 121600091993 - 2² = 121600091989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121600091993.

It is not a weakly prime, because it can be changed into another prime (121600091593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60800045996 + 60800045997.

It is an arithmetic number, because the mean of its divisors is an integer number (60800045997).

Almost surely, 2^121600091993 is an apocalyptic number.

It is an amenable number.

121600091993 is a deficient number, since it is larger than the sum of its proper divisors (1).

121600091993 is an equidigital number, since it uses as much as digits as its factorization.

121600091993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26244, while the sum is 41.

The spelling of 121600091993 in words is "one hundred twenty-one billion, six hundred million, ninety-one thousand, nine hundred ninety-three".