121200256 has 16 divisors (see below), whose sum is σ = 241453890. Its totient is φ = 60600064.

The previous prime is 121200227. The next prime is 121200257. The reversal of 121200256 is 652002121.

It can be written as a sum of positive squares in only one way, i.e., 96040000 + 25160256 = 9800^2 + 5016^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (121200257) 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 as a sum of consecutive naturals, namely, 473311 + ... + 473566.

Almost surely, 2^121200256 is an apocalyptic number.

121200256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121200256 is a deficient number, since it is larger than the sum of its proper divisors (120253634).

121200256 is an frugal number, since it uses more digits than its factorization.

121200256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946891 (or 946879 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121200256 is about 11009.0987823709. The cubic root of 121200256 is about 494.8814544542.

Adding to 121200256 its reverse (652002121), we get a palindrome (773202377).

The spelling of 121200256 in words is "one hundred twenty-one million, two hundred thousand, two hundred fifty-six".