121806201 has 32 divisors (see below), whose sum is σ = 182131200. Its totient is φ = 71786880.

The previous prime is 121806197. The next prime is 121806211. The reversal of 121806201 is 102608121.

It is not a de Polignac number, because 121806201 - 2² = 121806197 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121806211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196470 + ... + 197088.

It is an arithmetic number, because the mean of its divisors is an integer number (5691600).

Almost surely, 2^121806201 is an apocalyptic number.

121806201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121806201 is a deficient number, since it is larger than the sum of its proper divisors (60324999).

121806201 is a wasteful number, since it uses less digits than its factorization.

121806201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 121806201 is about 11036.5846619323. The cubic root of 121806201 is about 495.7048096674.

It can be divided in two parts, 12180 and 6201, that added together give a palindrome (18381).

The spelling of 121806201 in words is "one hundred twenty-one million, eight hundred six thousand, two hundred one".