121344400016 has 40 divisors (see below), whose sum is σ = 272701504320. Its totient is φ = 51228549504.

The previous prime is 121344400007. The next prime is 121344400027. The reversal of 121344400016 is 610004443121.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8077811 + ... + 8092818.

It is an arithmetic number, because the mean of its divisors is an integer number (6817537608).

Almost surely, 2^121344400016 is an apocalyptic number.

121344400016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

121344400016 is an abundant number, since it is smaller than the sum of its proper divisors (151357104304).

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

121344400016 is a wasteful number, since it uses less digits than its factorization.

121344400016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16170711 (or 16170705 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 121344400016 its reverse (610004443121), we get a palindrome (731348843137).

The spelling of 121344400016 in words is "one hundred twenty-one billion, three hundred forty-four million, four hundred thousand, sixteen".