243121244012 has 12 divisors (see below), whose sum is σ = 447854923320. Its totient is φ = 115162694496.

The previous prime is 243121243997. The next prime is 243121244071. The reversal of 243121244012 is 210442121342.

It is a super-2 number, since 2×243121244012² (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, 1599481793 + ... + 1599481944.

It is an arithmetic number, because the mean of its divisors is an integer number (37321243610).

Almost surely, 2^243121244012 is an apocalyptic number.

It is an amenable number.

243121244012 is a deficient number, since it is larger than the sum of its proper divisors (204733679308).

243121244012 is a wasteful number, since it uses less digits than its factorization.

243121244012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3198963760 (or 3198963758 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 243121244012 its reverse (210442121342), we get a palindrome (453563365354).

The spelling of 243121244012 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred forty-four thousand, twelve".