211011211211 has 4 divisors (see below), whose sum is σ = 211813535472. Its totient is φ = 210208886952.

The previous prime is 211011211193. The next prime is 211011211217. The reversal of 211011211211 is 112112110112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211011211211 - 2³⁴ = 193831342027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211011211217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401161736 + ... + 401162261.

It is an arithmetic number, because the mean of its divisors is an integer number (52953383868).

Almost surely, 2^211011211211 is an apocalyptic number.

211011211211 is a deficient number, since it is larger than the sum of its proper divisors (802324261).

211011211211 is an equidigital number, since it uses as much as digits as its factorization.

211011211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802324260.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211011211211 its reverse (112112110112), we get a palindrome (323123321323).

It can be divided in two parts, 2110112 and 11211, that multiplied together give a palindrome (23656465632).

The spelling of 211011211211 in words is "two hundred eleven billion, eleven million, two hundred eleven thousand, two hundred eleven".