121233565 has 16 divisors (see below), whose sum is σ = 148746240. Its totient is φ = 94832640.

The previous prime is 121233559. The next prime is 121233569. The reversal of 121233565 is 565332121.

It is not a de Polignac number, because 121233565 - 2²³ = 112844957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121233569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43741 + ... + 46429.

It is an arithmetic number, because the mean of its divisors is an integer number (9296640).

Almost surely, 2^121233565 is an apocalyptic number.

It is an amenable number.

121233565 is a deficient number, since it is larger than the sum of its proper divisors (27512675).

121233565 is a wasteful number, since it uses less digits than its factorization.

121233565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892.

The product of its digits is 5400, while the sum is 28.

The square root of 121233565 is about 11010.6114725750. The cubic root of 121233565 is about 494.9267857570.

Adding to 121233565 its reverse (565332121), we get a palindrome (686565686).

The spelling of 121233565 in words is "one hundred twenty-one million, two hundred thirty-three thousand, five hundred sixty-five".