12211201993 has 2 divisors, whose sum is σ = 12211201994. Its totient is φ = 12211201992.

The previous prime is 12211201987. The next prime is 12211202027. The reversal of 12211201993 is 39910211221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11852023689 + 359178304 = 108867^2 + 18952^2 .

It is a cyclic number.

It is not a de Polignac number, because 12211201993 - 2⁹ = 12211201481 is a prime.

It is a super-2 number, since 2×12211201993² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12211201973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105600996 + 6105600997.

It is an arithmetic number, because the mean of its divisors is an integer number (6105600997).

Almost surely, 2^12211201993 is an apocalyptic number.

It is an amenable number.

12211201993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211201993 is an equidigital number, since it uses as much as digits as its factorization.

12211201993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The spelling of 12211201993 in words is "twelve billion, two hundred eleven million, two hundred one thousand, nine hundred ninety-three".