121000022197 has 2 divisors, whose sum is σ = 121000022198. Its totient is φ = 121000022196.

The previous prime is 121000022189. The next prime is 121000022261. The reversal of 121000022197 is 791220000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60503208676 + 60496813521 = 245974^2 + 245961^2 .

It is an emirp because it is prime and its reverse (791220000121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121000022197 - 2³ = 121000022189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121000022107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500011098 + 60500011099.

It is an arithmetic number, because the mean of its divisors is an integer number (60500011099).

Almost surely, 2^121000022197 is an apocalyptic number.

It is an amenable number.

121000022197 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000022197 is an equidigital number, since it uses as much as digits as its factorization.

121000022197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 25.

The spelling of 121000022197 in words is "one hundred twenty-one billion, twenty-two thousand, one hundred ninety-seven".