2001001010 has 16 divisors (see below), whose sum is σ = 3603217176. Its totient is φ = 800085888.

The previous prime is 2001001003. The next prime is 2001001019. The reversal of 2001001010 is 101001002.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1206381289 + 794619721 = 34733^2 + 28189^2 .

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 = 2001000985 and 2001001003.

It is not an unprimeable number, because it can be changed into a prime (2001001019) 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, 11669 + ... + 64328.

Almost surely, 2^2001001010 is an apocalyptic number.

2001001010 is a deficient number, since it is larger than the sum of its proper divisors (1602216166).

2001001010 is a wasteful number, since it uses less digits than its factorization.

2001001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78637.

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

The square root of 2001001010 is about 44732.5497820100. The cubic root of 2001001010 is about 1260.1312137644.

Adding to 2001001010 its reverse (101001002), we get a palindrome (2102002012).

The spelling of 2001001010 in words is "two billion, one million, one thousand, ten".