11121101221212 has 72 divisors (see below), whose sum is σ = 29091840649872. Its totient is φ = 3579310425600.

The previous prime is 11121101221169. The next prime is 11121101221213. The reversal of 11121101221212 is 21212210112111.

It is a happy number.

11121101221212 is a `hidden beast` number, since 11 + 121 + 101 + 221 + 212 = 666.

11121101221212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (11121101221213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31692589 + ... + 32041572.

Almost surely, 2^{11121101221212} is an apocalyptic number.

11121101221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11121101221212 is an abundant number, since it is smaller than the sum of its proper divisors (17970739428660).

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

11121101221212 is a wasteful number, since it uses less digits than its factorization.

11121101221212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63734339 (or 63734334 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11121101221212 its reverse (21212210112111), we get a palindrome (32333311333323).

The spelling of 11121101221212 in words is "eleven trillion, one hundred twenty-one billion, one hundred one million, two hundred twenty-one thousand, two hundred twelve".