211020021211 has 16 divisors (see below), whose sum is σ = 218877120000. Its totient is φ = 203343412896.

The previous prime is 211020021193. The next prime is 211020021221. The reversal of 211020021211 is 112120020112.

It is a cyclic number.

It is not a de Polignac number, because 211020021211 - 2³⁷ = 73581067739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211020021191 and 211020021200.

It is not an unprimeable number, because it can be changed into a prime (211020021221) 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, 485025 + ... + 810733.

It is an arithmetic number, because the mean of its divisors is an integer number (13679820000).

Almost surely, 2^211020021211 is an apocalyptic number.

211020021211 is a deficient number, since it is larger than the sum of its proper divisors (7857098789).

211020021211 is a wasteful number, since it uses less digits than its factorization.

211020021211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325986.

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

Adding to 211020021211 its reverse (112120020112), we get a palindrome (323140041323).

The spelling of 211020021211 in words is "two hundred eleven billion, twenty million, twenty-one thousand, two hundred eleven".