11215121612 has 24 divisors (see below), whose sum is σ = 20784546720. Its totient is φ = 5276793600.

The previous prime is 11215121573. The next prime is 11215121641. The reversal of 11215121612 is 21612151211.

It is a happy number.

11215121612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 540689 + ... + 561047.

It is an arithmetic number, because the mean of its divisors is an integer number (866022780).

Almost surely, 2^11215121612 is an apocalyptic number.

It is an amenable number.

11215121612 is a deficient number, since it is larger than the sum of its proper divisors (9569425108).

11215121612 is a wasteful number, since it uses less digits than its factorization.

11215121612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28481 (or 28479 counting only the distinct ones).

The product of its digits is 240, while the sum is 23.

Adding to 11215121612 its reverse (21612151211), we get a palindrome (32827272823).

The spelling of 11215121612 in words is "eleven billion, two hundred fifteen million, one hundred twenty-one thousand, six hundred twelve".