121217424320 has 56 divisors (see below), whose sum is σ = 288977301648. Its totient is φ = 48431820800.

The previous prime is 121217424319. The next prime is 121217424323. The reversal of 121217424320 is 23424712121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121217424323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66935 + ... + 496905.

It is an arithmetic number, because the mean of its divisors is an integer number (5160308958).

Almost surely, 2^121217424320 is an apocalyptic number.

121217424320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121217424320 is an abundant number, since it is smaller than the sum of its proper divisors (167759877328).

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

121217424320 is an equidigital number, since it uses as much as digits as its factorization.

121217424320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430869 (or 430859 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The spelling of 121217424320 in words is "one hundred twenty-one billion, two hundred seventeen million, four hundred twenty-four thousand, three hundred twenty".