11001220021212 has 12 divisors (see below), whose sum is σ = 25669513382856. Its totient is φ = 3667073340400.

The previous prime is 11001220021193. The next prime is 11001220021229. The reversal of 11001220021212 is 21212002210011.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 11001220021191 and 11001220021200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458384167539 + ... + 458384167562.

It is an arithmetic number, because the mean of its divisors is an integer number (2139126115238).

Almost surely, 2^{11001220021212} is an apocalyptic number.

11001220021212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11001220021212 is an abundant number, since it is smaller than the sum of its proper divisors (14668293361644).

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

11001220021212 is a wasteful number, since it uses less digits than its factorization.

11001220021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 916768335108 (or 916768335106 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11001220021212 its reverse (21212002210011), we get a palindrome (32213222231223).

The spelling of 11001220021212 in words is "eleven trillion, one billion, two hundred twenty million, twenty-one thousand, two hundred twelve".