11121021212 has 24 divisors (see below), whose sum is σ = 22378505856. Its totient is φ = 4736909808.

The previous prime is 11121021199. The next prime is 11121021227. The reversal of 11121021212 is 21212012111.

11121021212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11121021212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1213778 + ... + 1222905.

It is an arithmetic number, because the mean of its divisors is an integer number (932437744).

Almost surely, 2^11121021212 is an apocalyptic number.

It is an amenable number.

11121021212 is an abundant number, since it is smaller than the sum of its proper divisors (11257484644).

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

11121021212 is a wasteful number, since it uses less digits than its factorization.

11121021212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436857 (or 2436855 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11121021212 its reverse (21212012111), we get a palindrome (32333033323).

The spelling of 11121021212 in words is "eleven billion, one hundred twenty-one million, twenty-one thousand, two hundred twelve".