10502021 has 4 divisors (see below), whose sum is σ = 10508652. Its totient is φ = 10495392.

The previous prime is 10501993. The next prime is 10502047. The reversal of 10502021 is 12020501.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12020501 = 1291 ⋅9311.

It can be written as a sum of positive squares in 2 ways, for example, as 9672100 + 829921 = 3110^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 10502021 - 2¹⁴ = 10485637 is a prime.

It is a super-2 number, since 2×10502021² = 220584890168882, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10501993 and 10502011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10502071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 611 + ... + 4623.

It is an arithmetic number, because the mean of its divisors is an integer number (2627163).

Almost surely, 2^10502021 is an apocalyptic number.

It is an amenable number.

10502021 is a deficient number, since it is larger than the sum of its proper divisors (6631).

10502021 is an equidigital number, since it uses as much as digits as its factorization.

10502021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6630.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 10502021 is about 3240.6821812699. The cubic root of 10502021 is about 218.9900053124.

Adding to 10502021 its reverse (12020501), we get a palindrome (22522522).

The spelling of 10502021 in words is "ten million, five hundred two thousand, twenty-one".