11220020221212 has 36 divisors (see below), whose sum is σ = 30940055762616. Its totient is φ = 3400006127520.

The previous prime is 11220020221183. The next prime is 11220020221213. The reversal of 11220020221212 is 21212202002211.

It is a happy number.

11220020221212 is a `hidden beast` number, since 1 + 12 + 200 + 20 + 221 + 212 = 666.

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 (11220020221213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14166691803 + ... + 14166692594.

It is an arithmetic number, because the mean of its divisors is an integer number (859445993406).

Almost surely, 2^{11220020221212} is an apocalyptic number.

11220020221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11220020221212 is an abundant number, since it is smaller than the sum of its proper divisors (19720035541404).

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

11220020221212 is a wasteful number, since it uses less digits than its factorization.

11220020221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28333384418 (or 28333384413 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 11220020221212 its reverse (21212202002211), we get a palindrome (32432222223423).

The spelling of 11220020221212 in words is "eleven trillion, two hundred twenty billion, twenty million, two hundred twenty-one thousand, two hundred twelve".