121121201 has 2 divisors, whose sum is σ = 121121202. Its totient is φ = 121121200.

The previous prime is 121121191. The next prime is 121121213. The reversal of 121121201 is 102121121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119683600 + 1437601 = 10940^2 + 1199^2 .

It is a cyclic number.

It is not a de Polignac number, because 121121201 - 2¹⁰ = 121120177 is a prime.

It is not a weakly prime, because it can be changed into another prime (121121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60560600 + 60560601.

It is an arithmetic number, because the mean of its divisors is an integer number (60560601).

Almost surely, 2^121121201 is an apocalyptic number.

It is an amenable number.

121121201 is a deficient number, since it is larger than the sum of its proper divisors (1).

121121201 is an equidigital number, since it uses as much as digits as its factorization.

121121201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121121201 is about 11005.5077574822. The cubic root of 121121201 is about 494.7738326720.

Adding to 121121201 its reverse (102121121), we get a palindrome (223242322).

The spelling of 121121201 in words is "one hundred twenty-one million, one hundred twenty-one thousand, two hundred one".