100102220221 has 4 divisors (see below), whose sum is σ = 100150325244. Its totient is φ = 100054115200.

The previous prime is 100102220219. The next prime is 100102220227. The reversal of 100102220221 is 122022201001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122022201001 = 23 ⋅5305313087.

It can be written as a sum of positive squares in 2 ways, for example, as 37787083321 + 62315136900 = 194389^2 + 249630^2 .

It is a cyclic number.

It is not a de Polignac number, because 100102220221 - 2¹ = 100102220219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102220227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24049390 + ... + 24053551.

It is an arithmetic number, because the mean of its divisors is an integer number (25037581311).

Almost surely, 2^100102220221 is an apocalyptic number.

It is an amenable number.

100102220221 is a deficient number, since it is larger than the sum of its proper divisors (48105023).

100102220221 is an equidigital number, since it uses as much as digits as its factorization.

100102220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48105022.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100102220221 its reverse (122022201001), we get a palindrome (222124421222).

The spelling of 100102220221 in words is "one hundred billion, one hundred two million, two hundred twenty thousand, two hundred twenty-one".