12101211211 has 2 divisors, whose sum is σ = 12101211212. Its totient is φ = 12101211210.

The previous prime is 12101211209. The next prime is 12101211223. The reversal of 12101211211 is 11211210121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12101211211 - 2¹ = 12101211209 is a prime.

Together with 12101211209, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 12101211191 and 12101211200.

It is not a weakly prime, because it can be changed into another prime (12101211251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050605605 + 6050605606.

It is an arithmetic number, because the mean of its divisors is an integer number (6050605606).

Almost surely, 2^12101211211 is an apocalyptic number.

12101211211 is a deficient number, since it is larger than the sum of its proper divisors (1).

12101211211 is an equidigital number, since it uses as much as digits as its factorization.

12101211211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12101211211 its reverse (11211210121), we get a palindrome (23312421332).

The spelling of 12101211211 in words is "twelve billion, one hundred one million, two hundred eleven thousand, two hundred eleven".