121643144053200 has 480 divisors, whose sum is σ = 539793649566720. Its totient is φ = 25276497292800.

The previous prime is 121643144053159. The next prime is 121643144053219. The reversal of 121643144053200 is 2350441346121.

121643144053200 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 4 + 3 + 1 + 440 + 5 + 3 + 200 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 72306414 + ... + 73969613.

It is an arithmetic number, because the mean of its divisors is an integer number (1124570103264).

Almost surely, 2^{121643144053200} is an apocalyptic number.

121643144053200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121643144053200 is an abundant number, since it is smaller than the sum of its proper divisors (418150505513520).

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

121643144053200 is a wasteful number, since it uses less digits than its factorization.

121643144053200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146276072 (or 146276055 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 121643144053200 its reverse (2350441346121), we get a palindrome (123993585399321).

The spelling of 121643144053200 in words is "one hundred twenty-one trillion, six hundred forty-three billion, one hundred forty-four million, fifty-three thousand, two hundred".