211321220011 has 32 divisors (see below), whose sum is σ = 238337510400. Its totient is φ = 185702002080.

The previous prime is 211321220003. The next prime is 211321220021. The reversal of 211321220011 is 110022123112.

It is a cyclic number.

It is not a de Polignac number, because 211321220011 - 2³ = 211321220003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (211321220021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81937920 + ... + 81940498.

It is an arithmetic number, because the mean of its divisors is an integer number (7448047200).

Almost surely, 2^211321220011 is an apocalyptic number.

211321220011 is a deficient number, since it is larger than the sum of its proper divisors (27016290389).

211321220011 is a wasteful number, since it uses less digits than its factorization.

211321220011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4359.

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

Adding to 211321220011 its reverse (110022123112), we get a palindrome (321343343123).

The spelling of 211321220011 in words is "two hundred eleven billion, three hundred twenty-one million, two hundred twenty thousand, eleven".