121599197 has 2 divisors, whose sum is σ = 121599198. Its totient is φ = 121599196.

The previous prime is 121599193. The next prime is 121599217. The reversal of 121599197 is 791995121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109286116 + 12313081 = 10454^2 + 3509^2 .

It is a cyclic number.

It is not a de Polignac number, because 121599197 - 2² = 121599193 is a prime.

It is a super-2 number, since 2×121599197² = 29572729422089618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121599193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60799598 + 60799599.

It is an arithmetic number, because the mean of its divisors is an integer number (60799599).

Almost surely, 2^121599197 is an apocalyptic number.

It is an amenable number.

121599197 is a deficient number, since it is larger than the sum of its proper divisors (1).

121599197 is an equidigital number, since it uses as much as digits as its factorization.

121599197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 44.

The square root of 121599197 is about 11027.2025917728. The cubic root of 121599197 is about 495.4238413173.

The spelling of 121599197 in words is "one hundred twenty-one million, five hundred ninety-nine thousand, one hundred ninety-seven".