100221020221 has 16 divisors (see below), whose sum is σ = 118566685440. Its totient is φ = 82886388480.

The previous prime is 100221020219. The next prime is 100221020267. The reversal of 100221020221 is 122020122001.

It is a happy number.

It is not a de Polignac number, because 100221020221 - 2¹ = 100221020219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221020021) 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, 143365 + ... + 470101.

It is an arithmetic number, because the mean of its divisors is an integer number (7410417840).

Almost surely, 2^100221020221 is an apocalyptic number.

It is an amenable number.

100221020221 is a deficient number, since it is larger than the sum of its proper divisors (18345665219).

100221020221 is a wasteful number, since it uses less digits than its factorization.

100221020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328284.

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

Adding to 100221020221 its reverse (122020122001), we get a palindrome (222241142222).

The spelling of 100221020221 in words is "one hundred billion, two hundred twenty-one million, twenty thousand, two hundred twenty-one".