1000021010 has 16 divisors (see below), whose sum is σ = 1800748800. Its totient is φ = 399850416.

The previous prime is 1000021003. The next prime is 1000021019. The reversal of 1000021010 is 101200001.

It is a happy number.

1000021010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (5).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1000020985 and 1000021003.

It is not an unprimeable number, because it can be changed into a prime (1000021019) 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, 8801 + ... + 45579.

It is an arithmetic number, because the mean of its divisors is an integer number (112546800).

Almost surely, 2^1000021010 is an apocalyptic number.

1000021010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1000021010 is a deficient number, since it is larger than the sum of its proper divisors (800727790).

1000021010 is a wasteful number, since it uses less digits than its factorization.

1000021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39505.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1000021010 is about 31623.1087972071. The cubic root of 1000021010 is about 1000.0070032843.

Adding to 1000021010 its reverse (101200001), we get a palindrome (1101221011).

The spelling of 1000021010 in words is "one billion, twenty-one thousand, ten".