121171147 has 2 divisors, whose sum is σ = 121171148. Its totient is φ = 121171146.

The previous prime is 121171129. The next prime is 121171159. The reversal of 121171147 is 741171121.

It is a strong prime.

It is an emirp because it is prime and its reverse (741171121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121171147 is a prime.

It is not a weakly prime, because it can be changed into another prime (121171117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60585573 + 60585574.

It is an arithmetic number, because the mean of its divisors is an integer number (60585574).

Almost surely, 2^121171147 is an apocalyptic number.

121171147 is a deficient number, since it is larger than the sum of its proper divisors (1).

121171147 is an equidigital number, since it uses as much as digits as its factorization.

121171147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 392, while the sum is 25.

The square root of 121171147 is about 11007.7766601617. The cubic root of 121171147 is about 494.8418322670.

The spelling of 121171147 in words is "one hundred twenty-one million, one hundred seventy-one thousand, one hundred forty-seven".