2103100021 has 8 divisors (see below), whose sum is σ = 2295129888. Its totient is φ = 1911210000.

The previous prime is 2103100019. The next prime is 2103100033. The reversal of 2103100021 is 1200013012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2103100021 - 2¹ = 2103100019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2103099980 and 2103100007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103100121) 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, 2170 + ... + 64891.

It is an arithmetic number, because the mean of its divisors is an integer number (286891236).

Almost surely, 2^2103100021 is an apocalyptic number.

It is an amenable number.

2103100021 is a deficient number, since it is larger than the sum of its proper divisors (192029867).

2103100021 is a wasteful number, since it uses less digits than its factorization.

2103100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69923.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 2103100021 is about 45859.5684781268. The cubic root of 2103100021 is about 1281.2089856996.

Adding to 2103100021 its reverse (1200013012), we get a palindrome (3303113033).

The spelling of 2103100021 in words is "two billion, one hundred three million, one hundred thousand, twenty-one".