12011211011 has 2 divisors, whose sum is σ = 12011211012.
Its totient is φ = 12011211010.
The previous prime is 12011210999. The next prime is 12011211013. The reversal of 12011211011 is 11011211021.
Adding to 12011211011 its reverse (11011211021), we get a palindrome (23022422032).
It is a strong prime.
It is an emirp because it is prime and its reverse (11011211021) is a distict prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-12011211011 is a prime.
Together with 12011211013, it forms a pair of twin primes.
It is a Chen prime.
It is a junction number, because it is equal to n+sod(n) for n = 12011210983 and 12011211001.
It is not a weakly prime, because it can be changed into another prime (12011211013) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005605505 + 6005605506.
It is an arithmetic number, because the mean of its divisors is an integer number (6005605506).
Almost surely, 212011211011 is an apocalyptic number.
12011211011 is a deficient number, since it is larger than the sum of its proper divisors (1).
12011211011 is an equidigital number, since it uses as much as digits as its factorization.
12011211011 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 4, while the sum is 11.
The spelling of 12011211011 in words is "twelve billion, eleven million, two hundred eleven thousand, eleven".