211111211011 has 8 divisors (see below), whose sum is σ = 222628594880. Its totient is φ = 199634453928.

The previous prime is 211111210963. The next prime is 211111211023. The reversal of 211111211011 is 110112111112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211111211011 - 2¹⁷ = 211111079939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211111210982 and 211111211000.

It is not an unprimeable number, because it can be changed into a prime (211111211071) 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, 10146021 + ... + 10166806.

It is an arithmetic number, because the mean of its divisors is an integer number (27828574360).

Almost surely, 2^211111211011 is an apocalyptic number.

211111211011 is a deficient number, since it is larger than the sum of its proper divisors (11517383869).

211111211011 is a wasteful number, since it uses less digits than its factorization.

211111211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20313393.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 211111211011 its reverse (110112111112), we get a palindrome (321223322123).

It can be divided in two parts, 2111112 and 11011, that multiplied together give a palindrome (23245454232).

The spelling of 211111211011 in words is "two hundred eleven billion, one hundred eleven million, two hundred eleven thousand, eleven".