11220012121000 has 64 divisors (see below), whose sum is σ = 27799230073680. Its totient is φ = 4224004556800.

The previous prime is 11220012120953. The next prime is 11220012121007. The reversal of 11220012121000 is 12121002211.

11220012121000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 312832150596 + 10907179970404 = 559314^2 + 3302602^2 .

It is not an unprimeable number, because it can be changed into a prime (11220012121007) 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, 329983357 + ... + 330017356.

Almost surely, 2^{11220012121000} is an apocalyptic number.

11220012121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220012121000 is an abundant number, since it is smaller than the sum of its proper divisors (16579217952680).

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

11220012121000 is a wasteful number, since it uses less digits than its factorization.

11220012121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660000751 (or 660000737 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11220012121000 its reverse (12121002211), we get a palindrome (11232133123211).

The spelling of 11220012121000 in words is "eleven trillion, two hundred twenty billion, twelve million, one hundred twenty-one thousand".