243121422042 has 24 divisors (see below), whose sum is σ = 554487454560. Its totient is φ = 76775185800.

The previous prime is 243121422041. The next prime is 243121422043. The reversal of 243121422042 is 240224121342.

It is a happy number.

243121422042 is a `hidden beast` number, since 2 + 4 + 312 + 142 + 204 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (243121422041) and next prime (243121422043).

It is a junction number, because it is equal to n+sod(n) for n = 243121421997 and 243121422015.

It is not an unprimeable number, because it can be changed into a prime (243121422041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 355440334 + ... + 355441017.

It is an arithmetic number, because the mean of its divisors is an integer number (23103643940).

Almost surely, 2^243121422042 is an apocalyptic number.

243121422042 is an abundant number, since it is smaller than the sum of its proper divisors (311366032518).

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

243121422042 is a wasteful number, since it uses less digits than its factorization.

243121422042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710881378 (or 710881375 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 243121422042 its reverse (240224121342), we get a palindrome (483345543384).

The spelling of 243121422042 in words is "two hundred forty-three billion, one hundred twenty-one million, four hundred twenty-two thousand, forty-two".