243121241512 has 16 divisors (see below), whose sum is σ = 457743834900. Its totient is φ = 121056218880.

The previous prime is 243121241507. The next prime is 243121241617. The reversal of 243121241512 is 215142121342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 199796484196 + 43324757316 = 446986^2 + 208146^2 .

It is a super-2 number, since 2×243121241512² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63048187 + ... + 63052042.

Almost surely, 2^243121241512 is an apocalyptic number.

It is an amenable number.

243121241512 is a deficient number, since it is larger than the sum of its proper divisors (214622593388).

243121241512 is a wasteful number, since it uses less digits than its factorization.

243121241512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126100476 (or 126100472 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

Adding to 243121241512 its reverse (215142121342), we get a palindrome (458263362854).

The spelling of 243121241512 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-one thousand, five hundred twelve".