121400320 has 88 divisors (see below), whose sum is σ = 295062768. Its totient is φ = 47923200.

The previous prime is 121400299. The next prime is 121400339. The reversal of 121400320 is 23004121.

It is a super-2 number, since 2×121400320² = 29476075392204800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121400320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670630 + ... + 670810.

It is an arithmetic number, because the mean of its divisors is an integer number (3352986).

Almost surely, 2^121400320 is an apocalyptic number.

121400320 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 121400320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147531384).

121400320 is an abundant number, since it is smaller than the sum of its proper divisors (173662448).

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

121400320 is a wasteful number, since it uses less digits than its factorization.

121400320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 121400320 is about 11018.1813381338. The cubic root of 121400320 is about 495.1536033185.

Adding to 121400320 its reverse (23004121), we get a palindrome (144404441).

The spelling of 121400320 in words is "one hundred twenty-one million, four hundred thousand, three hundred twenty".