11211211012 has 24 divisors (see below), whose sum is σ = 19672637600. Its totient is φ = 5590480896.

The previous prime is 11211211001. The next prime is 11211211013. The reversal of 11211211012 is 21011211211.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 11211210983 and 11211211001.

It is not an unprimeable number, because it can be changed into a prime (11211211013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2640163 + ... + 2644405.

Almost surely, 2^11211211012 is an apocalyptic number.

It is an amenable number.

11211211012 is a deficient number, since it is larger than the sum of its proper divisors (8461426588).

11211211012 is a wasteful number, since it uses less digits than its factorization.

11211211012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5875 (or 5873 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11211211012 its reverse (21011211211), we get a palindrome (32222422223).

The spelling of 11211211012 in words is "eleven billion, two hundred eleven million, two hundred eleven thousand, twelve".