121613201 has 4 divisors (see below), whose sum is σ = 121646004. Its totient is φ = 121580400.

The previous prime is 121613197. The next prime is 121613203. The reversal of 121613201 is 102316121.

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 80640400 + 40972801 = 8980^2 + 6401^2 .

It is a cyclic number.

It is not a de Polignac number, because 121613201 - 2² = 121613197 is a prime.

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 121613201.

It is not an unprimeable number, because it can be changed into a prime (121613203) 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 3 ways as a sum of consecutive naturals, for example, 10010 + ... + 18531.

It is an arithmetic number, because the mean of its divisors is an integer number (30411501).

Almost surely, 2^121613201 is an apocalyptic number.

It is an amenable number.

121613201 is a deficient number, since it is larger than the sum of its proper divisors (32803).

121613201 is an equidigital number, since it uses as much as digits as its factorization.

121613201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32802.

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

The square root of 121613201 is about 11027.8375486765. The cubic root of 121613201 is about 495.4428591215.

Adding to 121613201 its reverse (102316121), we get a palindrome (223929322).

The spelling of 121613201 in words is "one hundred twenty-one million, six hundred thirteen thousand, two hundred one".