2100101 has 4 divisors (see below), whose sum is σ = 2144832. Its totient is φ = 2055372.

The previous prime is 2100097. The next prime is 2100113. The reversal of 2100101 is 1010012.

It is a happy number.

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 not a de Polignac number, because 2100101 - 2² = 2100097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22295 + ... + 22388.

It is an arithmetic number, because the mean of its divisors is an integer number (536208).

2^2100101 is an apocalyptic number.

It is an amenable number.

2100101 is a deficient number, since it is larger than the sum of its proper divisors (44731).

2100101 is an equidigital number, since it uses as much as digits as its factorization.

2100101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44730.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 2100101 is about 1449.1725225107. The cubic root of 2100101 is about 128.0599694578.

Adding to 2100101 its reverse (1010012), we get a palindrome (3110113).

Multiplying 2100101 by its reverse (1010012), we get a palindrome (2121127211212).

The spelling of 2100101 in words is "two million, one hundred thousand, one hundred one".