102320220021 has 16 divisors (see below), whose sum is σ = 143237784000. Its totient is φ = 64878283008.

The previous prime is 102320220019. The next prime is 102320220031. The reversal of 102320220021 is 120022023201.

It is a happy number.

It is not a de Polignac number, because 102320220021 - 2¹ = 102320220019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102320220031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8770996 + ... + 8782653.

It is an arithmetic number, because the mean of its divisors is an integer number (8952361500).

Almost surely, 2^102320220021 is an apocalyptic number.

It is an amenable number.

102320220021 is a deficient number, since it is larger than the sum of its proper divisors (40917563979).

102320220021 is a wasteful number, since it uses less digits than its factorization.

102320220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17553748.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 102320220021 its reverse (120022023201), we get a palindrome (222342243222).

The spelling of 102320220021 in words is "one hundred two billion, three hundred twenty million, two hundred twenty thousand, twenty-one".