121544500 has 216 divisors, whose sum is σ = 347694984. Its totient is φ = 36960000.

The previous prime is 121544477. The next prime is 121544537. The reversal of 121544500 is 5445121.

It can be written as a sum of positive squares in 4 ways, for example, as 27415696 + 94128804 = 5236^2 + 9702^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 2964480 + ... + 2964520.

It is an arithmetic number, because the mean of its divisors is an integer number (1609699).

Almost surely, 2^121544500 is an apocalyptic number.

121544500 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 121544500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173847492).

121544500 is an abundant number, since it is smaller than the sum of its proper divisors (226150484).

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

121544500 is a wasteful number, since it uses less digits than its factorization.

121544500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 121544500 is about 11024.7222187228. The cubic root of 121544500 is about 495.3495473455.

Adding to 121544500 its reverse (5445121), we get a palindrome (126989621).

The spelling of 121544500 in words is "one hundred twenty-one million, five hundred forty-four thousand, five hundred".