102020344021 has 4 divisors (see below), whose sum is σ = 102043320844. Its totient is φ = 101997367200.

The previous prime is 102020344001. The next prime is 102020344033. The reversal of 102020344021 is 120443020201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19568092996 + 82452251025 = 139886^2 + 287145^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020344021 - 2¹³ = 102020335829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102020344021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020344001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11481750 + ... + 11490631.

It is an arithmetic number, because the mean of its divisors is an integer number (25510830211).

Almost surely, 2^102020344021 is an apocalyptic number.

It is an amenable number.

102020344021 is a deficient number, since it is larger than the sum of its proper divisors (22976823).

102020344021 is an equidigital number, since it uses as much as digits as its factorization.

102020344021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22976822.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 102020344021 its reverse (120443020201), we get a palindrome (222463364222).

The spelling of 102020344021 in words is "one hundred two billion, twenty million, three hundred forty-four thousand, twenty-one".