121216353 has 8 divisors (see below), whose sum is σ = 164671488. Its totient is φ = 79286064.

The previous prime is 121216349. The next prime is 121216357. The reversal of 121216353 is 353612121.

It is an interprime number because it is at equal distance from previous prime (121216349) and next prime (121216357).

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

It is not a de Polignac number, because 121216353 - 2² = 121216349 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121216357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381025 + ... + 381342.

It is an arithmetic number, because the mean of its divisors is an integer number (20583936).

Almost surely, 2^121216353 is an apocalyptic number.

It is an amenable number.

121216353 is a deficient number, since it is larger than the sum of its proper divisors (43455135).

121216353 is an equidigital number, since it uses as much as digits as its factorization.

121216353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762423.

The product of its digits is 1080, while the sum is 24.

The square root of 121216353 is about 11009.8298351973. The cubic root of 121216353 is about 494.9033624225.

Adding to 121216353 its reverse (353612121), we get a palindrome (474828474).

The spelling of 121216353 in words is "one hundred twenty-one million, two hundred sixteen thousand, three hundred fifty-three".