211320221011 has 4 divisors (see below), whose sum is σ = 214296562224. Its totient is φ = 208343879800.

The previous prime is 211320221009. The next prime is 211320221093. The reversal of 211320221011 is 110122023112.

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 211320221011 - 2¹ = 211320221009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211320221111) 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, 1488170500 + ... + 1488170641.

It is an arithmetic number, because the mean of its divisors is an integer number (53574140556).

Almost surely, 2^211320221011 is an apocalyptic number.

211320221011 is a deficient number, since it is larger than the sum of its proper divisors (2976341213).

211320221011 is an equidigital number, since it uses as much as digits as its factorization.

211320221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976341212.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 211320221011 its reverse (110122023112), we get a palindrome (321442244123).

The spelling of 211320221011 in words is "two hundred eleven billion, three hundred twenty million, two hundred twenty-one thousand, eleven".