121520206 has 8 divisors (see below), whose sum is σ = 182430000. Its totient is φ = 60710208.

The previous prime is 121520197. The next prime is 121520227. The reversal of 121520206 is 602025121.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 21826 + ... + 26821.

It is an arithmetic number, because the mean of its divisors is an integer number (22803750).

Almost surely, 2^121520206 is an apocalyptic number.

121520206 is a deficient number, since it is larger than the sum of its proper divisors (60909794).

121520206 is a wasteful number, since it uses less digits than its factorization.

121520206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49898.

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

The square root of 121520206 is about 11023.6203671933. The cubic root of 121520206 is about 495.3165420847.

Adding to 121520206 its reverse (602025121), we get a palindrome (723545327).

It can be divided in two parts, 121 and 520206, that multiplied together give a palindrome (62944926).

The spelling of 121520206 in words is "one hundred twenty-one million, five hundred twenty thousand, two hundred six".