211001101011 has 8 divisors (see below), whose sum is σ = 312594223760. Its totient is φ = 140667400656.

The previous prime is 211001100971. The next prime is 211001101019. The reversal of 211001101011 is 110101100112.

It is not a de Polignac number, because 211001101011 - 2¹¹ = 211001098963 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211001100984 and 211001101002.

It is not an unprimeable number, because it can be changed into a prime (211001101019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3907427770 + ... + 3907427823.

It is an arithmetic number, because the mean of its divisors is an integer number (39074277970).

Almost surely, 2^211001101011 is an apocalyptic number.

211001101011 is a deficient number, since it is larger than the sum of its proper divisors (101593122749).

211001101011 is an equidigital number, since it uses as much as digits as its factorization.

211001101011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7814855602 (or 7814855596 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 211001101011 its reverse (110101100112), we get a palindrome (321102201123).

The spelling of 211001101011 in words is "two hundred eleven billion, one million, one hundred one thousand, eleven".