211001010101011 has 4 divisors (see below), whose sum is σ = 227231857031872. Its totient is φ = 194770163170152.

The previous prime is 211001010101003. The next prime is 211001010101059. The reversal of 211001010101011 is 110101010100112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211001010101011 - 2³ = 211001010101003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211001010101411) 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 in 3 ways as a sum of consecutive naturals, for example, 8115423465411 + ... + 8115423465436.

It is an arithmetic number, because the mean of its divisors is an integer number (56807964257968).

Almost surely, 2^{211001010101011} is an apocalyptic number.

211001010101011 is a deficient number, since it is larger than the sum of its proper divisors (16230846930861).

211001010101011 is a wasteful number, since it uses less digits than its factorization.

211001010101011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16230846930860.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 211001010101011 its reverse (110101010100112), we get a palindrome (321102020201123).

The spelling of 211001010101011 in words is "two hundred eleven trillion, one billion, ten million, one hundred one thousand, eleven".