121147 has 4 divisors (see below), whose sum is σ = 130480. Its totient is φ = 111816.

The previous prime is 121139. The next prime is 121151. The reversal of 121147 is 741121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121147 - 2³ = 121139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121147.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 121147.

It is not an unprimeable number, because it can be changed into a prime (121157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4647 + ... + 4672.

It is an arithmetic number, because the mean of its divisors is an integer number (32620).

2¹²¹¹⁴⁷ is an apocalyptic number.

121147 is a deficient number, since it is larger than the sum of its proper divisors (9333).

121147 is an equidigital number, since it uses as much as digits as its factorization.

121147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9332.

The product of its digits is 56, while the sum is 16.

The square root of 121147 is about 348.0617761260. The cubic root of 121147 is about 49.4808959371.

Adding to 121147 its reverse (741121), we get a palindrome (862268).

It can be divided in two parts, 12114 and 7, that added together give a palindrome (12121).

The spelling of 121147 in words is "one hundred twenty-one thousand, one hundred forty-seven", and thus it is an iban number.