121212220201211 has 8 divisors (see below), whose sum is σ = 121553936935200. Its totient is φ = 120870822385152.

The previous prime is 121212220201153. The next prime is 121212220201217. The reversal of 121212220201211 is 112102022212121.

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

It is a cyclic number.

It is not a de Polignac number, because 121212220201211 - 2⁶ = 121212220201147 is a prime.

It is a super-4 number, since 4×121212220201211⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121212220201217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78968255 + ... + 80488568.

It is an arithmetic number, because the mean of its divisors is an integer number (15194242116900).

Almost surely, 2^{121212220201211} is an apocalyptic number.

121212220201211 is a deficient number, since it is larger than the sum of its proper divisors (341716733989).

121212220201211 is a wasteful number, since it uses less digits than its factorization.

121212220201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159458965.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121212220201211 its reverse (112102022212121), we get a palindrome (233314242413332).

The spelling of 121212220201211 in words is "one hundred twenty-one trillion, two hundred twelve billion, two hundred twenty million, two hundred one thousand, two hundred eleven".