121644073152 has 84 divisors (see below), whose sum is σ = 398480895696. Its totient is φ = 34755448320.

The previous prime is 121644073151. The next prime is 121644073153. The reversal of 121644073152 is 251370446121.

121644073152 is a `hidden beast` number, since 1 + 2 + 1 + 644 + 0 + 7 + 3 + 1 + 5 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (121644073151) and next prime (121644073153).

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121644073151) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 15080799 + ... + 15088862.

Almost surely, 2^121644073152 is an apocalyptic number.

121644073152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121644073152 is an abundant number, since it is smaller than the sum of its proper divisors (276836822544).

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

121644073152 is a wasteful number, since it uses less digits than its factorization.

121644073152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30169686 (or 30169673 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 121644073152 in words is "one hundred twenty-one billion, six hundred forty-four million, seventy-three thousand, one hundred fifty-two".