121204004502400 has 192 divisors, whose sum is σ = 303908434552800. Its totient is φ = 47755218124800.

The previous prime is 121204004502307. The next prime is 121204004502401. The reversal of 121204004502400 is 4205400402121.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121204004502401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179301045 + ... + 179975755.

Almost surely, 2^{121204004502400} is an apocalyptic number.

121204004502400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121204004502400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151954217276400).

121204004502400 is an abundant number, since it is smaller than the sum of its proper divisors (182704430050400).

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

121204004502400 is an equidigital number, since it uses as much as digits as its factorization.

121204004502400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675577 (or 675560 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 121204004502400 its reverse (4205400402121), we get a palindrome (125409404904521).

The spelling of 121204004502400 in words is "one hundred twenty-one trillion, two hundred four billion, four million, five hundred two thousand, four hundred".