121205238 has 32 divisors (see below), whose sum is σ = 302227200. Its totient is φ = 31481760.

The previous prime is 121205233. The next prime is 121205309. The reversal of 121205238 is 832502121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121205233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130713 + ... + 131636.

It is an arithmetic number, because the mean of its divisors is an integer number (9444600).

Almost surely, 2^121205238 is an apocalyptic number.

121205238 is an abundant number, since it is smaller than the sum of its proper divisors (181021962).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121205238 is a wasteful number, since it uses less digits than its factorization.

121205238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262372.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 121205238 is about 11009.3250474314. The cubic root of 121205238 is about 494.8882351484. Note that the first 3 decimals are identical.

Adding to 121205238 its reverse (832502121), we get a palindrome (953707359).

The spelling of 121205238 in words is "one hundred twenty-one million, two hundred five thousand, two hundred thirty-eight".