121143165 has 32 divisors (see below), whose sum is σ = 227719296. Its totient is φ = 54216960.

The previous prime is 121143163. The next prime is 121143193. The reversal of 121143165 is 561341121.

It is a happy number.

It is not a de Polignac number, because 121143165 - 2¹ = 121143163 is a prime.

It is a super-3 number, since 3×121143165³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121143161) 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 in 31 ways as a sum of consecutive naturals, for example, 26094 + ... + 30383.

It is an arithmetic number, because the mean of its divisors is an integer number (7116228).

Almost surely, 2^121143165 is an apocalyptic number.

121143165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121143165 is a deficient number, since it is larger than the sum of its proper divisors (106576131).

121143165 is a wasteful number, since it uses less digits than its factorization.

121143165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56509.

The product of its digits is 720, while the sum is 24.

The square root of 121143165 is about 11006.5055762490. The cubic root of 121143165 is about 494.8037381318.

Adding to 121143165 its reverse (561341121), we get a palindrome (682484286).

The spelling of 121143165 in words is "one hundred twenty-one million, one hundred forty-three thousand, one hundred sixty-five".