2101243 has 2 divisors, whose sum is σ = 2101244. Its totient is φ = 2101242.

The previous prime is 2101237. The next prime is 2101247. The reversal of 2101243 is 3421012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2101243 - 2²¹ = 4091 is a prime.

It is not a weakly prime, because it can be changed into another prime (2101247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050621 + 1050622.

It is an arithmetic number, because the mean of its divisors is an integer number (1050622).

2^2101243 is an apocalyptic number.

2101243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2101243 is an equidigital number, since it uses as much as digits as its factorization.

2101243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2101243 is about 1449.5664869195. The cubic root of 2101243 is about 128.0831775456.

Adding to 2101243 its reverse (3421012), we get a palindrome (5522255).

The spelling of 2101243 in words is "two million, one hundred one thousand, two hundred forty-three".