121343530144 has 48 divisors (see below), whose sum is σ = 246770205696. Its totient is φ = 58674412800.

The previous prime is 121343530129. The next prime is 121343530159. The reversal of 121343530144 is 441035343121.

It is an interprime number because it is at equal distance from previous prime (121343530129) and next prime (121343530159).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1433974 + ... + 1516234.

It is an arithmetic number, because the mean of its divisors is an integer number (5141045952).

Almost surely, 2^121343530144 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 121343530144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123385102848).

121343530144 is an abundant number, since it is smaller than the sum of its proper divisors (125426675552).

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

121343530144 is a wasteful number, since it uses less digits than its factorization.

121343530144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83789 (or 83781 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 121343530144 its reverse (441035343121), we get a palindrome (562378873265).

The spelling of 121343530144 in words is "one hundred twenty-one billion, three hundred forty-three million, five hundred thirty thousand, one hundred forty-four".