121324011520 has 256 divisors, whose sum is σ = 315782232480. Its totient is φ = 44568674304.

The previous prime is 121324011511. The next prime is 121324011541. The reversal of 121324011520 is 25110423121.

It is a tau number, because it is divible by the number of its divisors (256).

It is a junction number, because it is equal to n+sod(n) for n = 121324011491 and 121324011500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119766534 + ... + 119767546.

Almost surely, 2^121324011520 is an apocalyptic number.

121324011520 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 121324011520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157891116240).

121324011520 is an abundant number, since it is smaller than the sum of its proper divisors (194458220960).

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

121324011520 is an equidigital number, since it uses as much as digits as its factorization.

121324011520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1080 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 121324011520 its reverse (25110423121), we get a palindrome (146434434641).

The spelling of 121324011520 in words is "one hundred twenty-one billion, three hundred twenty-four million, eleven thousand, five hundred twenty".