243121245342 has 64 divisors (see below), whose sum is σ = 542052000000. Its totient is φ = 72244293120.

The previous prime is 243121245331. The next prime is 243121245347. The reversal of 243121245342 is 243542121342.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243121245347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12957784 + ... + 12976532.

It is an arithmetic number, because the mean of its divisors is an integer number (8469562500).

Almost surely, 2^243121245342 is an apocalyptic number.

243121245342 is an abundant number, since it is smaller than the sum of its proper divisors (298930754658).

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

243121245342 is a wasteful number, since it uses less digits than its factorization.

243121245342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25481.

The product of its digits is 46080, while the sum is 33.

Adding to 243121245342 its reverse (243542121342), we get a palindrome (486663366684).

The spelling of 243121245342 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-five thousand, three hundred forty-two".