211021020011 has 16 divisors (see below), whose sum is σ = 222137752320. Its totient is φ = 200069744160.

The previous prime is 211021019959. The next prime is 211021020017. The reversal of 211021020011 is 110020120112.

It is a cyclic number.

It is not a de Polignac number, because 211021020011 - 2¹⁸ = 211020757867 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211021019974 and 211021020001.

It is not an unprimeable number, because it can be changed into a prime (211021020017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2547401 + ... + 2628933.

It is an arithmetic number, because the mean of its divisors is an integer number (13883609520).

Almost surely, 2^211021020011 is an apocalyptic number.

211021020011 is a deficient number, since it is larger than the sum of its proper divisors (11116732309).

211021020011 is a wasteful number, since it uses less digits than its factorization.

211021020011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82546.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211021020011 its reverse (110020120112), we get a palindrome (321041140123).

The spelling of 211021020011 in words is "two hundred eleven billion, twenty-one million, twenty thousand, eleven".