1021000044 has 24 divisors (see below), whose sum is σ = 2385437040. Its totient is φ = 339889984.

The previous prime is 1021000039. The next prime is 1021000063. The reversal of 1021000044 is 4400001201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1020999993 and 1021000029.

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, 45759 + ... + 64310.

It is an arithmetic number, because the mean of its divisors is an integer number (99393210).

Almost surely, 2^1021000044 is an apocalyptic number.

It is an amenable number.

1021000044 is an abundant number, since it is smaller than the sum of its proper divisors (1364436996).

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

1021000044 is a wasteful number, since it uses less digits than its factorization.

1021000044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110849 (or 110847 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 1021000044 is about 31953.0913058502. The cubic root of 1021000044 is about 1006.9515782495.

Adding to 1021000044 its reverse (4400001201), we get a palindrome (5421001245).

The spelling of 1021000044 in words is "one billion, twenty-one million, forty-four", and thus it is an aban number.