243121300422 has 512 divisors, whose sum is σ = 730730004480. Its totient is φ = 51813457920.

The previous prime is 243121300421. The next prime is 243121300441. The reversal of 243121300422 is 224003121342.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 243121300392 and 243121300401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121300421) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 139164153 + ... + 139165899.

It is an arithmetic number, because the mean of its divisors is an integer number (1427207040).

Almost surely, 2^243121300422 is an apocalyptic number.

243121300422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 243121300422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365365002240).

243121300422 is an abundant number, since it is smaller than the sum of its proper divisors (487608704058).

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

243121300422 is a wasteful number, since it uses less digits than its factorization.

243121300422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 243121300422 its reverse (224003121342), we get a palindrome (467124421764).

The spelling of 243121300422 in words is "two hundred forty-three billion, one hundred twenty-one million, three hundred thousand, four hundred twenty-two".