10021243 has 2 divisors, whose sum is σ = 10021244. Its totient is φ = 10021242.

The previous prime is 10021241. The next prime is 10021247. The reversal of 10021243 is 34212001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10021243 - 2¹ = 10021241 is a prime.

It is a super-2 number, since 2×10021243² = 200850622530098, which contains 22 as substring.

Together with 10021241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (10021241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010621 + 5010622.

It is an arithmetic number, because the mean of its divisors is an integer number (5010622).

Almost surely, 2^10021243 is an apocalyptic number.

10021243 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021243 is an equidigital number, since it uses as much as digits as its factorization.

10021243 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 10021243 is about 3165.6346914955. The cubic root of 10021243 is about 215.5959166263.

Adding to 10021243 its reverse (34212001), we get a palindrome (44233244).

The spelling of 10021243 in words is "ten million, twenty-one thousand, two hundred forty-three".