12212122011109 has 2 divisors, whose sum is σ = 12212122011110. Its totient is φ = 12212122011108.

The previous prime is 12212122011091. The next prime is 12212122011137. The reversal of 12212122011109 is 90111022121221.

Together with previous prime (12212122011091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9425299104225 + 2786822906884 = 3070065^2 + 1669378^2 .

It is a cyclic number.

It is not a de Polignac number, because 12212122011109 - 2²¹ = 12212119913957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12212122011809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106061005554 + 6106061005555.

It is an arithmetic number, because the mean of its divisors is an integer number (6106061005555).

Almost surely, 2^{12212122011109} is an apocalyptic number.

It is an amenable number.

12212122011109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12212122011109 is an equidigital number, since it uses as much as digits as its factorization.

12212122011109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 12212122011109 in words is "twelve trillion, two hundred twelve billion, one hundred twenty-two million, eleven thousand, one hundred nine".