243042213121140 has 192 divisors, whose sum is σ = 688248533306880. Its totient is φ = 64079918622720.

The previous prime is 243042213121109. The next prime is 243042213121261. The reversal of 243042213121140 is 41121312240342.

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 = 243042213121098 and 243042213121107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1542625209 + ... + 1542782751.

It is an arithmetic number, because the mean of its divisors is an integer number (3584627777640).

Almost surely, 2^{243042213121140} is an apocalyptic number.

243042213121140 is a gapful number since it is divisible by the number (20) 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 243042213121140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344124266653440).

243042213121140 is an abundant number, since it is smaller than the sum of its proper divisors (445206320185740).

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

243042213121140 is a wasteful number, since it uses less digits than its factorization.

243042213121140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158522 (or 158520 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 243042213121140 its reverse (41121312240342), we get a palindrome (284163525361482).

The spelling of 243042213121140 in words is "two hundred forty-three trillion, forty-two billion, two hundred thirteen million, one hundred twenty-one thousand, one hundred forty".