121612361 has 4 divisors (see below), whose sum is σ = 130967172. Its totient is φ = 112257552.

The previous prime is 121612333. The next prime is 121612367. The reversal of 121612361 is 163216121.

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 5382400 + 116229961 = 2320^2 + 10781^2 .

It is a cyclic number.

It is not a de Polignac number, because 121612361 - 2¹⁰ = 121611337 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121612367) 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, 4677386 + ... + 4677411.

It is an arithmetic number, because the mean of its divisors is an integer number (32741793).

Almost surely, 2^121612361 is an apocalyptic number.

It is an amenable number.

121612361 is a deficient number, since it is larger than the sum of its proper divisors (9354811).

121612361 is an equidigital number, since it uses as much as digits as its factorization.

121612361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9354810.

The product of its digits is 432, while the sum is 23.

The square root of 121612361 is about 11027.7994631749. The cubic root of 121612361 is about 495.4417184203.

Adding to 121612361 its reverse (163216121), we get a palindrome (284828482).

The spelling of 121612361 in words is "one hundred twenty-one million, six hundred twelve thousand, three hundred sixty-one".