102020213321 has 4 divisors (see below), whose sum is σ = 109867922052. Its totient is φ = 94172504592.

The previous prime is 102020213311. The next prime is 102020213329. The reversal of 102020213321 is 123312020201.

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 46682355721 + 55337857600 = 216061^2 + 235240^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020213321 - 2¹⁰ = 102020212297 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 102020213321.

It is not an unprimeable number, because it can be changed into a prime (102020213329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3923854346 + ... + 3923854371.

It is an arithmetic number, because the mean of its divisors is an integer number (27466980513).

Almost surely, 2^102020213321 is an apocalyptic number.

It is an amenable number.

102020213321 is a deficient number, since it is larger than the sum of its proper divisors (7847708731).

102020213321 is an equidigital number, since it uses as much as digits as its factorization.

102020213321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7847708730.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 102020213321 its reverse (123312020201), we get a palindrome (225332233522).

The spelling of 102020213321 in words is "one hundred two billion, twenty million, two hundred thirteen thousand, three hundred twenty-one".