201820101011 has 2 divisors, whose sum is σ = 201820101012. Its totient is φ = 201820101010.

The previous prime is 201820100987. The next prime is 201820101013. The reversal of 201820101011 is 110101028102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201820101011 is a prime.

Together with 201820101013, 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 (201820101013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100910050505 + 100910050506.

It is an arithmetic number, because the mean of its divisors is an integer number (100910050506).

Almost surely, 2^201820101011 is an apocalyptic number.

201820101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

201820101011 is an equidigital number, since it uses as much as digits as its factorization.

201820101011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 201820101011 its reverse (110101028102), we get a palindrome (311921129113).

The spelling of 201820101011 in words is "two hundred one billion, eight hundred twenty million, one hundred one thousand, eleven".