121321201 has 4 divisors (see below), whose sum is σ = 122455152. Its totient is φ = 120187252.

The previous prime is 121321177. The next prime is 121321229. The reversal of 121321201 is 102123121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 102123121 = 743 ⋅137447.

It is a cyclic number.

It is not a de Polignac number, because 121321201 - 2¹¹ = 121319153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121321001) 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, 566815 + ... + 567028.

It is an arithmetic number, because the mean of its divisors is an integer number (30613788).

Almost surely, 2^121321201 is an apocalyptic number.

It is an amenable number.

121321201 is a deficient number, since it is larger than the sum of its proper divisors (1133951).

121321201 is a wasteful number, since it uses less digits than its factorization.

121321201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133950.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 121321201 is about 11014.5903691422. The cubic root of 121321201 is about 495.0460127958.

Adding to 121321201 its reverse (102123121), we get a palindrome (223444322).

The spelling of 121321201 in words is "one hundred twenty-one million, three hundred twenty-one thousand, two hundred one".