121431324 has 48 divisors (see below), whose sum is σ = 327737088. Its totient is φ = 34274688.

The previous prime is 121431313. The next prime is 121431361. The reversal of 121431324 is 423134121.

It is a Harshad number since it is a multiple of its sum of digits (21).

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

It is a self number, because there is not a number n which added to its sum of digits gives 121431324.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1737 + ... + 15680.

It is an arithmetic number, because the mean of its divisors is an integer number (6827856).

Almost surely, 2^121431324 is an apocalyptic number.

121431324 is a gapful number since it is divisible by the number (14) 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 121431324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163868544).

121431324 is an abundant number, since it is smaller than the sum of its proper divisors (206305764).

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

121431324 is a wasteful number, since it uses less digits than its factorization.

121431324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17514 (or 17512 counting only the distinct ones).

The product of its digits is 576, while the sum is 21.

The square root of 121431324 is about 11019.5881955725. The cubic root of 121431324 is about 495.1957515754.

Adding to 121431324 its reverse (423134121), we get a palindrome (544565445).

The spelling of 121431324 in words is "one hundred twenty-one million, four hundred thirty-one thousand, three hundred twenty-four".