121161197 has 2 divisors, whose sum is σ = 121161198. Its totient is φ = 121161196.

The previous prime is 121161181. The next prime is 121161221. The reversal of 121161197 is 791161121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119486761 + 1674436 = 10931^2 + 1294^2 .

It is a cyclic number.

It is not a de Polignac number, because 121161197 - 2⁴ = 121161181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121161137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60580598 + 60580599.

It is an arithmetic number, because the mean of its divisors is an integer number (60580599).

Almost surely, 2^121161197 is an apocalyptic number.

It is an amenable number.

121161197 is a deficient number, since it is larger than the sum of its proper divisors (1).

121161197 is an equidigital number, since it uses as much as digits as its factorization.

121161197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 29.

The square root of 121161197 is about 11007.3246976729. The cubic root of 121161197 is about 494.8282872080.

The spelling of 121161197 in words is "one hundred twenty-one million, one hundred sixty-one thousand, one hundred ninety-seven".