11220110221212 has 18 divisors (see below), whose sum is σ = 28361945281488. Its totient is φ = 3740036740392.

The previous prime is 11220110221207. The next prime is 11220110221213. The reversal of 11220110221212 is 21212201102211.

11220110221212 is a `hidden beast` number, since 1 + 1 + 220 + 1 + 10 + 221 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×11220110221212² (a number of 27 digits) contains 22 as substring.

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 (11220110221213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 155834864148 + ... + 155834864219.

Almost surely, 2^{11220110221212} is an apocalyptic number.

11220110221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11220110221212 is an abundant number, since it is smaller than the sum of its proper divisors (17141835060276).

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

11220110221212 is a wasteful number, since it uses less digits than its factorization.

11220110221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311669728377 (or 311669728372 counting only the distinct ones).

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

Adding to 11220110221212 its reverse (21212201102211), we get a palindrome (32432311323423).

The spelling of 11220110221212 in words is "eleven trillion, two hundred twenty billion, one hundred ten million, two hundred twenty-one thousand, two hundred twelve".