2104001001 has 20 divisors (see below), whose sum is σ = 3147390532. Its totient is φ = 1400714208.

The previous prime is 2104000981. The next prime is 2104001017. The reversal of 2104001001 is 1001004012.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1995944976 + 108056025 = 44676^2 + 10395^2 .

It is not a de Polignac number, because 2104001001 - 2¹³ = 2103992809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104001071) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 41655 + ... + 77091.

Almost surely, 2^2104001001 is an apocalyptic number.

It is an amenable number.

2104001001 is a deficient number, since it is larger than the sum of its proper divisors (1043389531).

2104001001 is an equidigital number, since it uses as much as digits as its factorization.

2104001001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36182 (or 36173 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2104001001 is about 45869.3906761361. The cubic root of 2104001001 is about 1281.3919186489.

Adding to 2104001001 its reverse (1001004012), we get a palindrome (3105005013).

The spelling of 2104001001 in words is "two billion, one hundred four million, one thousand, one".