2104021001 has 4 divisors (see below), whose sum is σ = 2104198404. Its totient is φ = 2103843600.

The previous prime is 2104020943. The next prime is 2104021013. The reversal of 2104021001 is 1001204012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1468728976 + 635292025 = 38324^2 + 25205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2104021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2104021061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69530 + ... + 95091.

It is an arithmetic number, because the mean of its divisors is an integer number (526049601).

Almost surely, 2^2104021001 is an apocalyptic number.

It is an amenable number.

2104021001 is a deficient number, since it is larger than the sum of its proper divisors (177403).

2104021001 is a wasteful number, since it uses less digits than its factorization.

2104021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177402.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2104021001 is about 45869.6086859262. The cubic root of 2104021001 is about 1281.3959788113.

Adding to 2104021001 its reverse (1001204012), we get a palindrome (3105225013).

The spelling of 2104021001 in words is "two billion, one hundred four million, twenty-one thousand, one".