1021003404044 has 24 divisors (see below), whose sum is σ = 1924360794720. Its totient is φ = 471192649344.

The previous prime is 1021003403993. The next prime is 1021003404067. The reversal of 1021003404044 is 4404043001201.

It is a happy number.

1021003404044 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199049 + ... + 1442784.

It is an arithmetic number, because the mean of its divisors is an integer number (80181699780).

Almost surely, 2^{1021003404044} is an apocalyptic number.

It is an amenable number.

1021003404044 is a deficient number, since it is larger than the sum of its proper divisors (903357390676).

1021003404044 is a wasteful number, since it uses less digits than its factorization.

1021003404044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1653809 (or 1653807 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 1021003404044 its reverse (4404043001201), we get a palindrome (5425046405245).

The spelling of 1021003404044 in words is "one trillion, twenty-one billion, three million, four hundred four thousand, forty-four".