121135261 has 8 divisors (see below), whose sum is σ = 130750200. Its totient is φ = 111562752.

The previous prime is 121135253. The next prime is 121135327. The reversal of 121135261 is 162531121.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2869636 + 118265625 = 1694^2 + 10875^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121135261 - 2³ = 121135253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121135061) 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 in 7 ways as a sum of consecutive naturals, for example, 4540 + ... + 16213.

It is an arithmetic number, because the mean of its divisors is an integer number (16343775).

Almost surely, 2^121135261 is an apocalyptic number.

It is an amenable number.

121135261 is a deficient number, since it is larger than the sum of its proper divisors (9614939).

121135261 is a wasteful number, since it uses less digits than its factorization.

121135261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21215.

The product of its digits is 360, while the sum is 22.

The square root of 121135261 is about 11006.1465100188. The cubic root of 121135261 is about 494.7929767218.

Adding to 121135261 its reverse (162531121), we get a palindrome (283666382).

The spelling of 121135261 in words is "one hundred twenty-one million, one hundred thirty-five thousand, two hundred sixty-one".