10240442021 has 2 divisors, whose sum is σ = 10240442022. Its totient is φ = 10240442020.

The previous prime is 10240441993. The next prime is 10240442033. The reversal of 10240442021 is 12024404201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9601060225 + 639381796 = 97985^2 + 25286^2 .

It is a cyclic number.

It is not a de Polignac number, because 10240442021 - 2¹⁸ = 10240179877 is a prime.

It is a super-3 number, since 3×10240442021³ (a number of 31 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10240441984 and 10240442002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10240442041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5120221010 + 5120221011.

It is an arithmetic number, because the mean of its divisors is an integer number (5120221011).

Almost surely, 2^10240442021 is an apocalyptic number.

It is an amenable number.

10240442021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10240442021 is an equidigital number, since it uses as much as digits as its factorization.

10240442021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 10240442021 its reverse (12024404201), we get a palindrome (22264846222).

The spelling of 10240442021 in words is "ten billion, two hundred forty million, four hundred forty-two thousand, twenty-one".