11212212211000 has 128 divisors (see below), whose sum is σ = 26419061036160. Its totient is φ = 4453710720000.

The previous prime is 11212212210973. The next prime is 11212212211007. The reversal of 11212212211000 is 11221221211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212212211007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 533472492 + ... + 533493508.

It is an arithmetic number, because the mean of its divisors is an integer number (206398914345).

Almost surely, 2^{11212212211000} is an apocalyptic number.

11212212211000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11212212211000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13209530518080).

11212212211000 is an abundant number, since it is smaller than the sum of its proper divisors (15206848825160).

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

11212212211000 is a wasteful number, since it uses less digits than its factorization.

11212212211000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24722 (or 24708 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11212212211000 its reverse (11221221211), we get a palindrome (11223433432211).

It can be divided in two parts, 11212 and 212211000, that added together give a palindrome (212222212).

The spelling of 11212212211000 in words is "eleven trillion, two hundred twelve billion, two hundred twelve million, two hundred eleven thousand".