12101221211 has 2 divisors, whose sum is σ = 12101221212. Its totient is φ = 12101221210.

The previous prime is 12101221199. The next prime is 12101221213. The reversal of 12101221211 is 11212210121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12101221211 - 2¹⁸ = 12100959067 is a prime.

It is a Sophie Germain prime.

Together with 12101221213, 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 (12101221213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050610605 + 6050610606.

It is an arithmetic number, because the mean of its divisors is an integer number (6050610606).

Almost surely, 2^12101221211 is an apocalyptic number.

12101221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101221211 is an equidigital number, since it uses as much as digits as its factorization.

12101221211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12101221211 its reverse (11212210121), we get a palindrome (23313431332).

The spelling of 12101221211 in words is "twelve billion, one hundred one million, two hundred twenty-one thousand, two hundred eleven".