121551206 has 8 divisors (see below), whose sum is σ = 208373520. Its totient is φ = 52093368.

The previous prime is 121551197. The next prime is 121551229. The reversal of 121551206 is 602155121.

It is a happy number.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4341101 + ... + 4341128.

It is an arithmetic number, because the mean of its divisors is an integer number (26046690).

Almost surely, 2^121551206 is an apocalyptic number.

121551206 is a deficient number, since it is larger than the sum of its proper divisors (86822314).

121551206 is an equidigital number, since it uses as much as digits as its factorization.

121551206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8682238.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 121551206 is about 11025.0263491749. The cubic root of 121551206 is about 495.3586571859.

The spelling of 121551206 in words is "one hundred twenty-one million, five hundred fifty-one thousand, two hundred six".