2103210101 has 4 divisors (see below), whose sum is σ = 2105251104. Its totient is φ = 2101169100.

The previous prime is 2103210071. The next prime is 2103210157. The reversal of 2103210101 is 1010123012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2103210101 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103212101) 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, 1018955 + ... + 1021016.

It is an arithmetic number, because the mean of its divisors is an integer number (526312776).

Almost surely, 2^2103210101 is an apocalyptic number.

It is an amenable number.

2103210101 is a deficient number, since it is larger than the sum of its proper divisors (2041003).

2103210101 is a wasteful number, since it uses less digits than its factorization.

2103210101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041002.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2103210101 is about 45860.7686481594. The cubic root of 2103210101 is about 1281.2313388962.

Adding to 2103210101 its reverse (1010123012), we get a palindrome (3113333113).

The spelling of 2103210101 in words is "two billion, one hundred three million, two hundred ten thousand, one hundred one".