211223313011 has 4 divisors (see below), whose sum is σ = 212886488832. Its totient is φ = 209560137192.

The previous prime is 211223312957. The next prime is 211223313071. The reversal of 211223313011 is 110313322112.

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 211223313011 - 2²² = 211219118707 is a prime.

It is a super-2 number, since 2×211223313011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211223313071) 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 3 ways as a sum of consecutive naturals, for example, 831587720 + ... + 831587973.

It is an arithmetic number, because the mean of its divisors is an integer number (53221622208).

Almost surely, 2^211223313011 is an apocalyptic number.

211223313011 is a deficient number, since it is larger than the sum of its proper divisors (1663175821).

211223313011 is a wasteful number, since it uses less digits than its factorization.

211223313011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663175820.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 211223313011 its reverse (110313322112), we get a palindrome (321536635123).

The spelling of 211223313011 in words is "two hundred eleven billion, two hundred twenty-three million, three hundred thirteen thousand, eleven".