2100501001 has 16 divisors (see below), whose sum is σ = 2190988800. Its totient is φ = 2011298688.

The previous prime is 2100500947. The next prime is 2100501037. The reversal of 2100501001 is 1001050012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2100501001 - 2⁹ = 2100500489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2100501401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2450565 + ... + 2451421.

It is an arithmetic number, because the mean of its divisors is an integer number (136936800).

Almost surely, 2^2100501001 is an apocalyptic number.

It is an amenable number.

2100501001 is a deficient number, since it is larger than the sum of its proper divisors (90487799).

2100501001 is a wasteful number, since it uses less digits than its factorization.

2100501001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 2100501001 is about 45831.2229926281. Note that the first 3 decimals coincide. The cubic root of 2100501001 is about 1280.6809936270.

Adding to 2100501001 its reverse (1001050012), we get a palindrome (3101551013).

The spelling of 2100501001 in words is "two billion, one hundred million, five hundred one thousand, one".