121420206 has 24 divisors (see below), whose sum is σ = 263376360. Its totient is φ = 40427376.

The previous prime is 121420181. The next prime is 121420207. The reversal of 121420206 is 602024121.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121420207) 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 11 ways as a sum of consecutive naturals, for example, 14905 + ... + 21563.

It is an arithmetic number, because the mean of its divisors is an integer number (10974015).

Almost surely, 2^121420206 is an apocalyptic number.

121420206 is an abundant number, since it is smaller than the sum of its proper divisors (141956154).

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

121420206 is a wasteful number, since it uses less digits than its factorization.

121420206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680 (or 7677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 121420206 is about 11019.0837187127. The cubic root of 121420206 is about 495.1806380823.

Adding to 121420206 its reverse (602024121), we get a palindrome (723444327).

The spelling of 121420206 in words is "one hundred twenty-one million, four hundred twenty thousand, two hundred six".