122212111221209 has 2 divisors, whose sum is σ = 122212111221210. Its totient is φ = 122212111221208.

The previous prime is 122212111221199. The next prime is 122212111221227. The reversal of 122212111221209 is 902122111212221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104852930611984 + 17359180609225 = 10239772^2 + 4166435^2 .

It is a cyclic number.

It is not a de Polignac number, because 122212111221209 - 2¹² = 122212111217113 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (122212111221709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61106055610604 + 61106055610605.

It is an arithmetic number, because the mean of its divisors is an integer number (61106055610605).

Almost surely, 2^{122212111221209} is an apocalyptic number.

It is an amenable number.

122212111221209 is a deficient number, since it is larger than the sum of its proper divisors (1).

122212111221209 is an equidigital number, since it uses as much as digits as its factorization.

122212111221209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 29.

The spelling of 122212111221209 in words is "one hundred twenty-two trillion, two hundred twelve billion, one hundred eleven million, two hundred twenty-one thousand, two hundred nine".