211113222011 has 4 divisors (see below), whose sum is σ = 211115179224. Its totient is φ = 211111264800.

The previous prime is 211113221989. The next prime is 211113222017. The reversal of 211113222011 is 110222311112.

It is a happy number.

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 211113222011 - 2¹⁸ = 211112959867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211113222017) 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, 806750 + ... + 1035891.

It is an arithmetic number, because the mean of its divisors is an integer number (52778794806).

Almost surely, 2^211113222011 is an apocalyptic number.

211113222011 is a deficient number, since it is larger than the sum of its proper divisors (1957213).

211113222011 is a wasteful number, since it uses less digits than its factorization.

211113222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957212.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211113222011 its reverse (110222311112), we get a palindrome (321335533123).

The spelling of 211113222011 in words is "two hundred eleven billion, one hundred thirteen million, two hundred twenty-two thousand, eleven".