2102101 has 4 divisors (see below), whose sum is σ = 2225772. Its totient is φ = 1978432.

The previous prime is 2102099. The next prime is 2102117. The reversal of 2102101 is 1012012.

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 1575025 + 527076 = 1255^2 + 726^2 .

It is a cyclic number.

It is not a de Polignac number, because 2102101 - 2¹ = 2102099 is a prime.

It is a super-2 number, since 2×2102101² = 8837657228402, which contains 22 as substring.

It is a Duffinian number.

2102101 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102171) 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, 61810 + ... + 61843.

It is an arithmetic number, because the mean of its divisors is an integer number (556443).

2^2102101 is an apocalyptic number.

It is an amenable number.

2102101 is a deficient number, since it is larger than the sum of its proper divisors (123671).

2102101 is a wasteful number, since it uses less digits than its factorization.

2102101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123670.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2102101 is about 1449.8624072649. The cubic root of 2102101 is about 128.1006085633.

Adding to 2102101 its reverse (1012012), we get a palindrome (3114113).

The spelling of 2102101 in words is "two million, one hundred two thousand, one hundred one".