121340400320 has 28 divisors (see below), whose sum is σ = 288941829024. Its totient is φ = 48536160000.

The previous prime is 121340400301. The next prime is 121340400329. The reversal of 121340400320 is 23004043121.

It is a super-2 number, since 2×121340400320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 121340400292 and 121340400301.

It is not an unprimeable number, because it can be changed into a prime (121340400329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 189594056 + ... + 189594695.

Almost surely, 2^121340400320 is an apocalyptic number.

121340400320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121340400320 is an abundant number, since it is smaller than the sum of its proper divisors (167601428704).

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

121340400320 is an equidigital number, since it uses as much as digits as its factorization.

121340400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379188768 (or 379188758 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 121340400320 its reverse (23004043121), we get a palindrome (144344443441).

The spelling of 121340400320 in words is "one hundred twenty-one billion, three hundred forty million, four hundred thousand, three hundred twenty".