121800547 has 8 divisors (see below), whose sum is σ = 135700992. Its totient is φ = 108371400.

The previous prime is 121800527. The next prime is 121800577. The reversal of 121800547 is 745008121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121800547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121800527) 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, 117279 + ... + 118312.

It is an arithmetic number, because the mean of its divisors is an integer number (16962624).

Almost surely, 2^121800547 is an apocalyptic number.

121800547 is a deficient number, since it is larger than the sum of its proper divisors (13900445).

121800547 is a wasteful number, since it uses less digits than its factorization.

121800547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235649.

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 121800547 is about 11036.3285108772. The cubic root of 121800547 is about 495.6971396737.

Adding to 121800547 its reverse (745008121), we get a palindrome (866808668).

The spelling of 121800547 in words is "one hundred twenty-one million, eight hundred thousand, five hundred forty-seven".