121222121220169 has 2 divisors, whose sum is σ = 121222121220170. Its totient is φ = 121222121220168.

The previous prime is 121222121220091. The next prime is 121222121220257. The reversal of 121222121220169 is 961022121222121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100902266080144 + 20319855140025 = 10045012^2 + 4507755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121222121220169 is a prime.

It is a super-2 number, since 2×121222121220169² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (121222121221169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60611060610084 + 60611060610085.

It is an arithmetic number, because the mean of its divisors is an integer number (60611060610085).

Almost surely, 2^{121222121220169} is an apocalyptic number.

It is an amenable number.

121222121220169 is a deficient number, since it is larger than the sum of its proper divisors (1).

121222121220169 is an equidigital number, since it uses as much as digits as its factorization.

121222121220169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 121222121220169 in words is "one hundred twenty-one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred twenty thousand, one hundred sixty-nine".