121216020044 has 12 divisors (see below), whose sum is σ = 242432040144. Its totient is φ = 51949722864.

The previous prime is 121216020019. The next prime is 121216020049. The reversal of 121216020044 is 440020612121.

121216020044 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (121216020049) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2164571759 + ... + 2164571814.

It is an arithmetic number, because the mean of its divisors is an integer number (20202670012).

Almost surely, 2^121216020044 is an apocalyptic number.

121216020044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

121216020044 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121216020044 is a wasteful number, since it uses less digits than its factorization.

121216020044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329143584 (or 4329143582 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 121216020044 its reverse (440020612121), we get a palindrome (561236632165).

The spelling of 121216020044 in words is "one hundred twenty-one billion, two hundred sixteen million, twenty thousand, forty-four".