121399344 has 160 divisors (see below), whose sum is σ = 387475200. Its totient is φ = 36080640.

The previous prime is 121399321. The next prime is 121399357. The reversal of 121399344 is 443993121.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 121399299 and 121399308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280152 + ... + 280584.

It is an arithmetic number, because the mean of its divisors is an integer number (2421720).

Almost surely, 2^121399344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121399344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193737600).

121399344 is an abundant number, since it is smaller than the sum of its proper divisors (266075856).

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

121399344 is a wasteful number, since it uses less digits than its factorization.

121399344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520 (or 508 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 121399344 is about 11018.1370476138. The cubic root of 121399344 is about 495.1522763829.

The spelling of 121399344 in words is "one hundred twenty-one million, three hundred ninety-nine thousand, three hundred forty-four".