121330211 has 2 divisors, whose sum is σ = 121330212. Its totient is φ = 121330210.

The previous prime is 121330201. The next prime is 121330213. The reversal of 121330211 is 112033121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121330211 is a prime.

It is a Sophie Germain prime.

Together with 121330213, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121330213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60665105 + 60665106.

It is an arithmetic number, because the mean of its divisors is an integer number (60665106).

Almost surely, 2^121330211 is an apocalyptic number.

121330211 is a deficient number, since it is larger than the sum of its proper divisors (1).

121330211 is an equidigital number, since it uses as much as digits as its factorization.

121330211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 121330211 is about 11014.9993645029. Note that the first 3 decimals coincide. The cubic root of 121330211 is about 495.0582674667.

Adding to 121330211 its sum of digits (14), we get a square (121330225 = 11015²).

Adding to 121330211 its reverse (112033121), we get a palindrome (233363332).

The spelling of 121330211 in words is "one hundred twenty-one million, three hundred thirty thousand, two hundred eleven".