501043121140 has 24 divisors (see below), whose sum is σ = 1052207107560. Its totient is φ = 200414095488.

The previous prime is 501043121099. The next prime is 501043121143. The reversal of 501043121140 is 41121340105.

It can be written as a sum of positive squares in 4 ways, for example, as 21220914276 + 479822206864 = 145674^2 + 692692^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (501043121143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1436154 + ... + 1750606.

It is an arithmetic number, because the mean of its divisors is an integer number (43841962815).

Almost surely, 2^501043121140 is an apocalyptic number.

It is an amenable number.

501043121140 is an abundant number, since it is smaller than the sum of its proper divisors (551163986420).

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

501043121140 is a wasteful number, since it uses less digits than its factorization.

501043121140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394131 (or 394129 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 501043121140 its reverse (41121340105), we get a palindrome (542164461245).

The spelling of 501043121140 in words is "five hundred one billion, forty-three million, one hundred twenty-one thousand, one hundred forty".