11222112121212 has 12 divisors (see below), whose sum is σ = 26184928282856. Its totient is φ = 3740704040400.

The previous prime is 11222112121091. The next prime is 11222112121219. The reversal of 11222112121212 is 21212121122211.

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

It is a super-2 number, since 2×11222112121212² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222112121219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467588005039 + ... + 467588005062.

Almost surely, 2^{11222112121212} is an apocalyptic number.

11222112121212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11222112121212 is an abundant number, since it is smaller than the sum of its proper divisors (14962816161644).

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

11222112121212 is a wasteful number, since it uses less digits than its factorization.

11222112121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935176010108 (or 935176010106 counting only the distinct ones).

The product of its digits is 128, while the sum is 21.

Adding to 11222112121212 its reverse (21212121122211), we get a palindrome (32434233243423).

Subtracting 11222112121212 from its reverse (21212121122211), we obtain a palindrome (9990009000999).

It can be divided in two parts, 1122211 and 2121212, that added together give a palindrome (3243423).

The spelling of 11222112121212 in words is "eleven trillion, two hundred twenty-two billion, one hundred twelve million, one hundred twenty-one thousand, two hundred twelve".