1232121554400 has 288 divisors, whose sum is σ = 4397156064000. Its totient is φ = 297193881600.

The previous prime is 1232121554399. The next prime is 1232121554423. The reversal of 1232121554400 is 44551212321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 5136336 + ... + 5370864.

It is an arithmetic number, because the mean of its divisors is an integer number (15267903000).

Almost surely, 2^{1232121554400} is an apocalyptic number.

1232121554400 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 1232121554400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2198578032000).

1232121554400 is an abundant number, since it is smaller than the sum of its proper divisors (3165034509600).

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

1232121554400 is a wasteful number, since it uses less digits than its factorization.

1232121554400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234762 (or 234749 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1232121554400 its reverse (44551212321), we get a palindrome (1276672766721).

The spelling of 1232121554400 in words is "one trillion, two hundred thirty-two billion, one hundred twenty-one million, five hundred fifty-four thousand, four hundred".