121216235 has 12 divisors (see below), whose sum is σ = 166328784. Its totient is φ = 83075040.

The previous prime is 121216229. The next prime is 121216237. The reversal of 121216235 is 532612121.

It is not a de Polignac number, because 121216235 - 2⁸ = 121215979 is a prime.

It is a super-3 number, since 3×121216235³ (a number of 25 digits) contains 333 as substring.

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 121216235.

It is not an unprimeable number, because it can be changed into a prime (121216237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64205 + ... + 66065.

It is an arithmetic number, because the mean of its divisors is an integer number (13860732).

Almost surely, 2^121216235 is an apocalyptic number.

121216235 is a deficient number, since it is larger than the sum of its proper divisors (45112549).

121216235 is an frugal number, since it uses more digits than its factorization.

121216235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3734 (or 1873 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 121216235 is about 11009.8244763484. The cubic root of 121216235 is about 494.9032018320.

Adding to 121216235 its reverse (532612121), we get a palindrome (653828356).

The spelling of 121216235 in words is "one hundred twenty-one million, two hundred sixteen thousand, two hundred thirty-five".