243121413252 has 12 divisors (see below), whose sum is σ = 567283297616. Its totient is φ = 81040471080.

The previous prime is 243121413233. The next prime is 243121413257. The reversal of 243121413252 is 252314121342.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×243121413252² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243121413257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10130058874 + ... + 10130058897.

Almost surely, 2^243121413252 is an apocalyptic number.

It is an amenable number.

243121413252 is an abundant number, since it is smaller than the sum of its proper divisors (324161884364).

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

243121413252 is a wasteful number, since it uses less digits than its factorization.

243121413252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20260117778 (or 20260117776 counting only the distinct ones).

The product of its digits is 11520, while the sum is 30.

Adding to 243121413252 its reverse (252314121342), we get a palindrome (495435534594).

The spelling of 243121413252 in words is "two hundred forty-three billion, one hundred twenty-one million, four hundred thirteen thousand, two hundred fifty-two".