12012221020091 has 2 divisors, whose sum is σ = 12012221020092. Its totient is φ = 12012221020090.

The previous prime is 12012221020081. The next prime is 12012221020103. The reversal of 12012221020091 is 19002012221021.

It is a weak prime.

It is an emirp because it is prime and its reverse (19002012221021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12012221020091 is a prime.

It is not a weakly prime, because it can be changed into another prime (12012221020061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006110510045 + 6006110510046.

It is an arithmetic number, because the mean of its divisors is an integer number (6006110510046).

Almost surely, 2^{12012221020091} is an apocalyptic number.

12012221020091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12012221020091 is an equidigital number, since it uses as much as digits as its factorization.

12012221020091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 12012221020091 in words is "twelve trillion, twelve billion, two hundred twenty-one million, twenty thousand, ninety-one".