21111010115011 has 2 divisors, whose sum is σ = 21111010115012. Its totient is φ = 21111010115010.

The previous prime is 21111010115009. The next prime is 21111010115071. The reversal of 21111010115011 is 11051101011112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21111010115011 - 2¹ = 21111010115009 is a prime.

Together with 21111010115009, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21111010115071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555505057505 + 10555505057506.

It is an arithmetic number, because the mean of its divisors is an integer number (10555505057506).

Almost surely, 2^{21111010115011} is an apocalyptic number.

21111010115011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21111010115011 is an equidigital number, since it uses as much as digits as its factorization.

21111010115011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10, while the sum is 16.

Adding to 21111010115011 its reverse (11051101011112), we get a palindrome (32162111126123).

The spelling of 21111010115011 in words is "twenty-one trillion, one hundred eleven billion, ten million, one hundred fifteen thousand, eleven".