11221212006 has 48 divisors (see below), whose sum is σ = 24979827600. Its totient is φ = 3639066624.

The previous prime is 11221212001. The next prime is 11221212007. The reversal of 11221212006 is 60021212211.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 11221212006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221212001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48550 + ... + 157478.

It is an arithmetic number, because the mean of its divisors is an integer number (520413075).

Almost surely, 2^11221212006 is an apocalyptic number.

11221212006 is an abundant number, since it is smaller than the sum of its proper divisors (13758615594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11221212006 is a wasteful number, since it uses less digits than its factorization.

11221212006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109093 (or 109090 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 11221212006 its reverse (60021212211), we get a palindrome (71242424217).

The spelling of 11221212006 in words is "eleven billion, two hundred twenty-one million, two hundred twelve thousand, six".