11122221021012 has 36 divisors (see below), whose sum is σ = 28177118997300. Its totient is φ = 3699149970432.

The previous prime is 11122221020993. The next prime is 11122221021017. The reversal of 11122221021012 is 21012012222111.

11122221021012 is a `hidden beast` number, since 1 + 11 + 222 + 210 + 210 + 12 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7860823408656 + 3261397612356 = 2803716^2 + 1805934^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122221021017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344026803 + ... + 344059130.

It is an arithmetic number, because the mean of its divisors is an integer number (782697749925).

Almost surely, 2^{11122221021012} is an apocalyptic number.

11122221021012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11122221021012 is an abundant number, since it is smaller than the sum of its proper divisors (17054897976288).

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

11122221021012 is a wasteful number, since it uses less digits than its factorization.

11122221021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688086392 (or 688086387 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 11122221021012 its reverse (21012012222111), we get a palindrome (32134233243123).

The spelling of 11122221021012 in words is "eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, twenty-one thousand, twelve".