121563121 has 16 divisors (see below), whose sum is σ = 132963840. Its totient is φ = 110712960.

The previous prime is 121563089. The next prime is 121563131. The reversal of 121563121 is 121365121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 121563121 - 2⁵ = 121563089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121563092 and 121563101.

It is not an unprimeable number, because it can be changed into a prime (121563131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101301 + ... + 102493.

It is an arithmetic number, because the mean of its divisors is an integer number (8310240).

Almost surely, 2^121563121 is an apocalyptic number.

It is an amenable number.

121563121 is a deficient number, since it is larger than the sum of its proper divisors (11400719).

121563121 is a wasteful number, since it uses less digits than its factorization.

121563121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

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

The square root of 121563121 is about 11025.5666974537. The cubic root of 121563121 is about 495.3748424238.

The spelling of 121563121 in words is "one hundred twenty-one million, five hundred sixty-three thousand, one hundred twenty-one".