11521212016 has 20 divisors (see below), whose sum is σ = 22331281024. Its totient is φ = 5758300800.

The previous prime is 11521211987. The next prime is 11521212029. The reversal of 11521212016 is 61021212511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102480 + ... + 183151.

Almost surely, 2^11521212016 is an apocalyptic number.

11521212016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11521212016 is a deficient number, since it is larger than the sum of its proper divisors (10810069008).

11521212016 is a wasteful number, since it uses less digits than its factorization.

11521212016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288160 (or 288154 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 22.

Multiplying 11521212016 by its sum of digits (22), we get a palindrome (253466664352).

Adding to 11521212016 its reverse (61021212511), we get a palindrome (72542424527).

The spelling of 11521212016 in words is "eleven billion, five hundred twenty-one million, two hundred twelve thousand, sixteen".