1021012040 has 32 divisors (see below), whose sum is σ = 2359369080. Its totient is φ = 397366272.

The previous prime is 1021012033. The next prime is 1021012049. The reversal of 1021012040 is 402101201.

1021012040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1020546916 + 465124 = 31946^2 + 682^2 .

It is not an unprimeable number, because it can be changed into a prime (1021012049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343457 + ... + 346416.

Almost surely, 2^1021012040 is an apocalyptic number.

1021012040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021012040 is an abundant number, since it is smaller than the sum of its proper divisors (1338357040).

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

1021012040 is a wasteful number, since it uses less digits than its factorization.

1021012040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689921 (or 689917 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1021012040 is about 31953.2790179662. The cubic root of 1021012040 is about 1006.9555218810.

Adding to 1021012040 its reverse (402101201), we get a palindrome (1423113241).

The spelling of 1021012040 in words is "one billion, twenty-one million, twelve thousand, forty".