121323212320 has 96 divisors (see below), whose sum is σ = 292127302656. Its totient is φ = 47602252800.

The previous prime is 121323212317. The next prime is 121323212327. The reversal of 121323212320 is 23212323121.

It is a junction number, because it is equal to n+sod(n) for n = 121323212291 and 121323212300.

It is not an unprimeable number, because it can be changed into a prime (121323212327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3564985 + ... + 3598855.

It is an arithmetic number, because the mean of its divisors is an integer number (3042992736).

Almost surely, 2^121323212320 is an apocalyptic number.

121323212320 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 121323212320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146063651328).

121323212320 is an abundant number, since it is smaller than the sum of its proper divisors (170804090336).

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

121323212320 is a wasteful number, since it uses less digits than its factorization.

121323212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34314 (or 34306 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 121323212320 its reverse (23212323121), we get a palindrome (144535535441).

The spelling of 121323212320 in words is "one hundred twenty-one billion, three hundred twenty-three million, two hundred twelve thousand, three hundred twenty".