21011010011 has 2 divisors, whose sum is σ = 21011010012. Its totient is φ = 21011010010.

The previous prime is 21011009993. The next prime is 21011010029. The reversal of 21011010011 is 11001011012.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (21011009993) and next prime (21011010029).

It is a cyclic number.

It is not a de Polignac number, because 21011010011 - 2⁶ = 21011009947 is a prime.

It is not a weakly prime, because it can be changed into another prime (21011010061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505505005 + 10505505006.

It is an arithmetic number, because the mean of its divisors is an integer number (10505505006).

Almost surely, 2^21011010011 is an apocalyptic number.

21011010011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011010011 is an equidigital number, since it uses as much as digits as its factorization.

21011010011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 21011010011 its reverse (11001011012), we get a palindrome (32012021023).

The spelling of 21011010011 in words is "twenty-one billion, eleven million, ten thousand, eleven".