4243121322044 has 18 divisors (see below), whose sum is σ = 8161871800152. Its totient is φ = 1928691509800.

The previous prime is 4243121322019. The next prime is 4243121322047. The reversal of 4243121322044 is 4402231213424.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 4243121322044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4243121322047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4383389312 + ... + 4383390279.

Almost surely, 2^{4243121322044} is an apocalyptic number.

4243121322044 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

4243121322044 is a deficient number, since it is larger than the sum of its proper divisors (3918750478108).

4243121322044 is a wasteful number, since it uses less digits than its factorization.

4243121322044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8766779617 (or 8766779604 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 4243121322044 its reverse (4402231213424), we get a palindrome (8645352535468).

The spelling of 4243121322044 in words is "four trillion, two hundred forty-three billion, one hundred twenty-one million, three hundred twenty-two thousand, forty-four".