20010100100221 has 96 divisors (see below), whose sum is σ = 26276186087424. Its totient is φ = 14905132704000.

The previous prime is 20010100100189. The next prime is 20010100100227. The reversal of 20010100100221 is 12200100101002.

It is not a de Polignac number, because 20010100100221 - 2⁵ = 20010100100189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010100100198 and 20010100100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010100100227) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 299290446 + ... + 299357296.

It is an arithmetic number, because the mean of its divisors is an integer number (273710271744).

Almost surely, 2^{20010100100221} is an apocalyptic number.

It is an amenable number.

20010100100221 is a deficient number, since it is larger than the sum of its proper divisors (6266085987203).

20010100100221 is a wasteful number, since it uses less digits than its factorization.

20010100100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67103 (or 67092 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 20010100100221 its reverse (12200100101002), we get a palindrome (32210200201223).

The spelling of 20010100100221 in words is "twenty trillion, ten billion, one hundred million, one hundred thousand, two hundred twenty-one".