121297937197 has 2 divisors, whose sum is σ = 121297937198. Its totient is φ = 121297937196.

The previous prime is 121297937179. The next prime is 121297937207. The reversal of 121297937197 is 791739792121.

Together with previous prime (121297937179) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101884809636 + 19413127561 = 319194^2 + 139331^2 .

It is a cyclic number.

It is not a de Polignac number, because 121297937197 - 2¹¹ = 121297935149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121297937897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60648968598 + 60648968599.

It is an arithmetic number, because the mean of its divisors is an integer number (60648968599).

Almost surely, 2^121297937197 is an apocalyptic number.

It is an amenable number.

121297937197 is a deficient number, since it is larger than the sum of its proper divisors (1).

121297937197 is an equidigital number, since it uses as much as digits as its factorization.

121297937197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000564, while the sum is 58.

The spelling of 121297937197 in words is "one hundred twenty-one billion, two hundred ninety-seven million, nine hundred thirty-seven thousand, one hundred ninety-seven".