11211323011 has 16 divisors (see below), whose sum is σ = 13255833600. Its totient is φ = 9278922240.

The previous prime is 11211323009. The next prime is 11211323051. The reversal of 11211323011 is 11032311211.

It is a happy number.

It is not a de Polignac number, because 11211323011 - 2¹ = 11211323009 is a prime.

It is a super-2 number, since 2×11211323011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211323051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39900 + ... + 154966.

It is an arithmetic number, because the mean of its divisors is an integer number (828489600).

Almost surely, 2^11211323011 is an apocalyptic number.

11211323011 is a deficient number, since it is larger than the sum of its proper divisors (2044510589).

11211323011 is a wasteful number, since it uses less digits than its factorization.

11211323011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115554.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11211323011 its reverse (11032311211), we get a palindrome (22243634222).

The spelling of 11211323011 in words is "eleven billion, two hundred eleven million, three hundred twenty-three thousand, eleven".