10284821021 has 2 divisors, whose sum is σ = 10284821022. Its totient is φ = 10284821020.

The previous prime is 10284821009. The next prime is 10284821083. The reversal of 10284821021 is 12012848201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9523612921 + 761208100 = 97589^2 + 27590^2 .

It is a cyclic number.

It is not a de Polignac number, because 10284821021 - 2⁶ = 10284820957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10284821621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5142410510 + 5142410511.

It is an arithmetic number, because the mean of its divisors is an integer number (5142410511).

Almost surely, 2^10284821021 is an apocalyptic number.

It is an amenable number.

10284821021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10284821021 is an equidigital number, since it uses as much as digits as its factorization.

10284821021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2048, while the sum is 29.

The spelling of 10284821021 in words is "ten billion, two hundred eighty-four million, eight hundred twenty-one thousand, twenty-one".