121544522400 has 576 divisors, whose sum is σ = 465006237696. Its totient is φ = 26998272000.

The previous prime is 121544522369. The next prime is 121544522401. The reversal of 121544522400 is 4225445121.

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

It is not an unprimeable number, because it can be changed into a prime (121544522401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 224666130 + ... + 224666670.

It is an arithmetic number, because the mean of its divisors is an integer number (807302496).

Almost surely, 2^121544522400 is an apocalyptic number.

121544522400 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 121544522400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232503118848).

121544522400 is an abundant number, since it is smaller than the sum of its proper divisors (343461715296).

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

121544522400 is a wasteful number, since it uses less digits than its factorization.

121544522400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 30.

Adding to 121544522400 its reverse (4225445121), we get a palindrome (125769967521).

The spelling of 121544522400 in words is "one hundred twenty-one billion, five hundred forty-four million, five hundred twenty-two thousand, four hundred".