121201211 has 4 divisors (see below), whose sum is σ = 128330712. Its totient is φ = 114071712.

The previous prime is 121201193. The next prime is 121201217. The reversal of 121201211 is 112102121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121201211 - 2¹⁸ = 120939067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121201192 and 121201201.

It is not an unprimeable number, because it can be changed into a prime (121201217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3564725 + ... + 3564758.

It is an arithmetic number, because the mean of its divisors is an integer number (32082678).

Almost surely, 2^121201211 is an apocalyptic number.

121201211 is a deficient number, since it is larger than the sum of its proper divisors (7129501).

121201211 is an equidigital number, since it uses as much as digits as its factorization.

121201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7129500.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 121201211 is about 11009.1421554997. The cubic root of 121201211 is about 494.8827542604.

Adding to 121201211 its reverse (112102121), we get a palindrome (233303332).

It can be divided in two parts, 12120 and 1211, that added together give a palindrome (13331).

The spelling of 121201211 in words is "one hundred twenty-one million, two hundred one thousand, two hundred eleven".