121182217 has 8 divisors (see below), whose sum is σ = 131660424. Its totient is φ = 110869248.

The previous prime is 121182203. The next prime is 121182251. The reversal of 121182217 is 712281121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22458121 + 98724096 = 4739^2 + 9936^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121182217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121182191 and 121182200.

It is not an unprimeable number, because it can be changed into a prime (121182277) 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 7 ways as a sum of consecutive naturals, for example, 39778 + ... + 42715.

It is an arithmetic number, because the mean of its divisors is an integer number (16457553).

Almost surely, 2^121182217 is an apocalyptic number.

It is an amenable number.

121182217 is a deficient number, since it is larger than the sum of its proper divisors (10478207).

121182217 is a wasteful number, since it uses less digits than its factorization.

121182217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82619.

The product of its digits is 448, while the sum is 25.

The square root of 121182217 is about 11008.2794750133. The cubic root of 121182217 is about 494.8569011246.

The spelling of 121182217 in words is "one hundred twenty-one million, one hundred eighty-two thousand, two hundred seventeen".