121211106 has 16 divisors (see below), whose sum is σ = 246996864. Its totient is φ = 39641264.

The previous prime is 121211063. The next prime is 121211113. The reversal of 121211106 is 601112121.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 190266 + ... + 190901.

It is an arithmetic number, because the mean of its divisors is an integer number (15437304).

Almost surely, 2^121211106 is an apocalyptic number.

121211106 is an abundant number, since it is smaller than the sum of its proper divisors (125785758).

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

121211106 is a wasteful number, since it uses less digits than its factorization.

121211106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381225.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 121211106 is about 11009.5915455570. The cubic root of 121211106 is about 494.8962214845.

Adding to 121211106 its reverse (601112121), we get a palindrome (722323227).

The spelling of 121211106 in words is "one hundred twenty-one million, two hundred eleven thousand, one hundred six".