12021145677616 has 40 divisors (see below), whose sum is σ = 23743644037200. Its totient is φ = 5894251837440.

The previous prime is 12021145677587. The next prime is 12021145677643. The reversal of 12021145677616 is 61677654112021.

It is a self number, because there is not a number n which added to its sum of digits gives 12021145677616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15181465 + ... + 15953656.

It is an arithmetic number, because the mean of its divisors is an integer number (593591100930).

Almost surely, 2^{12021145677616} is an apocalyptic number.

12021145677616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12021145677616 is a deficient number, since it is larger than the sum of its proper divisors (11722498359584).

12021145677616 is a wasteful number, since it uses less digits than its factorization.

12021145677616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31135597 (or 31135591 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 49.

Adding to 12021145677616 its reverse (61677654112021), we get a palindrome (73698799789637).

The spelling of 12021145677616 in words is "twelve trillion, twenty-one billion, one hundred forty-five million, six hundred seventy-seven thousand, six hundred sixteen".