121216301 has 4 divisors (see below), whose sum is σ = 121260252. Its totient is φ = 121172352.

The previous prime is 121216297. The next prime is 121216313. The reversal of 121216301 is 103612121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19811401 + 101404900 = 4451^2 + 10070^2 .

It is a cyclic number.

It is not a de Polignac number, because 121216301 - 2² = 121216297 is a prime.

It is an alternating number because its digits alternate between odd and even.

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 121216301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121216321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17540 + ... + 23453.

It is an arithmetic number, because the mean of its divisors is an integer number (30315063).

Almost surely, 2^121216301 is an apocalyptic number.

It is an amenable number.

121216301 is a deficient number, since it is larger than the sum of its proper divisors (43951).

121216301 is an equidigital number, since it uses as much as digits as its factorization.

121216301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43950.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 121216301 is about 11009.8274736710. The cubic root of 121216301 is about 494.9032916538.

Adding to 121216301 its reverse (103612121), we get a palindrome (224828422).

The spelling of 121216301 in words is "one hundred twenty-one million, two hundred sixteen thousand, three hundred one".