102020100221 has 32 divisors (see below), whose sum is σ = 118274956800. Its totient is φ = 87211650240.

The previous prime is 102020100179. The next prime is 102020100241. The reversal of 102020100221 is 122001020201.

It is a happy number.

It is not a de Polignac number, because 102020100221 - 2⁶ = 102020100157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020100241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2144390 + ... + 2191448.

It is an arithmetic number, because the mean of its divisors is an integer number (3696092400).

Almost surely, 2^102020100221 is an apocalyptic number.

It is an amenable number.

102020100221 is a deficient number, since it is larger than the sum of its proper divisors (16254856579).

102020100221 is a wasteful number, since it uses less digits than its factorization.

102020100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47289.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 102020100221 its reverse (122001020201), we get a palindrome (224021120422).

The spelling of 102020100221 in words is "one hundred two billion, twenty million, one hundred thousand, two hundred twenty-one".