121244443140 has 96 divisors (see below), whose sum is σ = 348643338624. Its totient is φ = 31463562240.

The previous prime is 121244443129. The next prime is 121244443157. The reversal of 121244443140 is 41344442121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 121244443098 and 121244443107.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 914547 + ... + 1038693.

It is an arithmetic number, because the mean of its divisors is an integer number (3631701444).

Almost surely, 2^121244443140 is an apocalyptic number.

121244443140 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 121244443140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174321669312).

121244443140 is an abundant number, since it is smaller than the sum of its proper divisors (227398895484).

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

121244443140 is a wasteful number, since it uses less digits than its factorization.

121244443140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124597 (or 124595 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

Adding to 121244443140 its reverse (41344442121), we get a palindrome (162588885261).

The spelling of 121244443140 in words is "one hundred twenty-one billion, two hundred forty-four million, four hundred forty-three thousand, one hundred forty".