2100001010 has 16 divisors (see below), whose sum is σ = 3780523800. Its totient is φ = 839884416.

The previous prime is 2100000997. The next prime is 2100001021. The reversal of 2100001010 is 101000012.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 344139601 + 1755861409 = 18551^2 + 41903^2 .

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 = 2100000985 and 2100001003.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132806 + ... + 147774.

Almost surely, 2^2100001010 is an apocalyptic number.

2100001010 is a deficient number, since it is larger than the sum of its proper divisors (1680522790).

2100001010 is a wasteful number, since it uses less digits than its factorization.

2100001010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29005.

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

The square root of 2100001010 is about 45825.7679695605. The cubic root of 2100001010 is about 1280.5793702867.

Adding to 2100001010 its reverse (101000012), we get a palindrome (2201001022).

The spelling of 2100001010 in words is "two billion, one hundred million, one thousand, ten".