121324140240 has 160 divisors (see below), whose sum is σ = 382775500800. Its totient is φ = 31780139520.

The previous prime is 121324140239. The next prime is 121324140251. The reversal of 121324140240 is 42041423121.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 121324140240.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24905005 + ... + 24909875.

It is an arithmetic number, because the mean of its divisors is an integer number (2392346880).

Almost surely, 2^121324140240 is an apocalyptic number.

121324140240 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 121324140240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191387750400).

121324140240 is an abundant number, since it is smaller than the sum of its proper divisors (261451360560).

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

121324140240 is a wasteful number, since it uses less digits than its factorization.

121324140240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6705 (or 6699 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 121324140240 its reverse (42041423121), we get a palindrome (163365563361).

The spelling of 121324140240 in words is "one hundred twenty-one billion, three hundred twenty-four million, one hundred forty thousand, two hundred forty".