102220210321 has 4 divisors (see below), whose sum is σ = 103368752100. Its totient is φ = 101071668544.

The previous prime is 102220210307. The next prime is 102220210343. The reversal of 102220210321 is 123012022201.

It is a happy number.

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 58897950721 + 43322259600 = 242689^2 + 208140^2 .

It is a cyclic number.

It is not a de Polignac number, because 102220210321 - 2³³ = 93630275729 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102220210295 and 102220210304.

It is not an unprimeable number, because it can be changed into a prime (102220210361) 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, 574270756 + ... + 574270933.

It is an arithmetic number, because the mean of its divisors is an integer number (25842188025).

Almost surely, 2^102220210321 is an apocalyptic number.

It is an amenable number.

102220210321 is a deficient number, since it is larger than the sum of its proper divisors (1148541779).

102220210321 is an equidigital number, since it uses as much as digits as its factorization.

102220210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148541778.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 102220210321 its reverse (123012022201), we get a palindrome (225232232522).

The spelling of 102220210321 in words is "one hundred two billion, two hundred twenty million, two hundred ten thousand, three hundred twenty-one".