121533300240 has 480 divisors, whose sum is σ = 431247065088. Its totient is φ = 28261094400.

The previous prime is 121533300199. The next prime is 121533300241. The reversal of 121533300240 is 42003335121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 121533300240.

It is not an unprimeable number, because it can be changed into a prime (121533300241) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 114329949 + ... + 114331011.

Almost surely, 2^121533300240 is an apocalyptic number.

121533300240 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 121533300240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215623532544).

121533300240 is an abundant number, since it is smaller than the sum of its proper divisors (309713764848).

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

121533300240 is a wasteful number, since it uses less digits than its factorization.

121533300240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

Adding to 121533300240 its reverse (42003335121), we get a palindrome (163536635361).

The spelling of 121533300240 in words is "one hundred twenty-one billion, five hundred thirty-three million, three hundred thousand, two hundred forty".