121200321 has 8 divisors (see below), whose sum is σ = 176291424. Its totient is φ = 73454720.

The previous prime is 121200319. The next prime is 121200323. The reversal of 121200321 is 123002121.

It is an interprime number because it is at equal distance from previous prime (121200319) and next prime (121200323).

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 121200321 - 2¹ = 121200319 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121200297 and 121200306.

It is not an unprimeable number, because it can be changed into a prime (121200323) 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, 1836336 + ... + 1836401.

It is an arithmetic number, because the mean of its divisors is an integer number (22036428).

Almost surely, 2^121200321 is an apocalyptic number.

121200321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121200321 is a deficient number, since it is larger than the sum of its proper divisors (55091103).

121200321 is a wasteful number, since it uses less digits than its factorization.

121200321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3672751.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 121200321 is about 11009.1017344741. The cubic root of 121200321 is about 494.8815429229.

Adding to 121200321 its reverse (123002121), we get a palindrome (244202442).

The spelling of 121200321 in words is "one hundred twenty-one million, two hundred thousand, three hundred twenty-one".