121200121 has 8 divisors (see below), whose sum is σ = 138962304. Its totient is φ = 103549920.

The previous prime is 121200109. The next prime is 121200139. The reversal of 121200121 is 121002121.

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 121200121 - 2¹¹ = 121198073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121200098 and 121200107.

It is not an unprimeable number, because it can be changed into a prime (121200151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25660 + ... + 30013.

It is an arithmetic number, because the mean of its divisors is an integer number (17370288).

Almost surely, 2^121200121 is an apocalyptic number.

It is an amenable number.

121200121 is a deficient number, since it is larger than the sum of its proper divisors (17762183).

121200121 is an equidigital number, since it uses as much as digits as its factorization.

121200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55991.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 121200121 is about 11009.0926510771. The cubic root of 121200121 is about 494.8812707114.

Adding to 121200121 its reverse (121002121), we get a palindrome (242202242).

The spelling of 121200121 in words is "one hundred twenty-one million, two hundred thousand, one hundred twenty-one".