211021020211 has 16 divisors (see below), whose sum is σ = 216817685280. Its totient is φ = 205313771520.

The previous prime is 211021020209. The next prime is 211021020239. The reversal of 211021020211 is 112020120112.

It is a cyclic number.

It is not a de Polignac number, because 211021020211 - 2¹ = 211021020209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211021020191 and 211021020200.

It is not an unprimeable number, because it can be changed into a prime (211021020311) 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, 2775696 + ... + 2850706.

It is an arithmetic number, because the mean of its divisors is an integer number (13551105330).

Almost surely, 2^211021020211 is an apocalyptic number.

211021020211 is a deficient number, since it is larger than the sum of its proper divisors (5796665069).

211021020211 is an equidigital number, since it uses as much as digits as its factorization.

211021020211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75606.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211021020211 its reverse (112020120112), we get a palindrome (323041140323).

Subtracting from 211021020211 its reverse (112020120112), we obtain a palindrome (99000900099).

The spelling of 211021020211 in words is "two hundred eleven billion, twenty-one million, twenty thousand, two hundred eleven".