100000201221 has 24 divisors (see below), whose sum is σ = 147713505056. Its totient is φ = 65171550240.

The previous prime is 100000201181. The next prime is 100000201237. The reversal of 100000201221 is 122102000001.

It is not a de Polignac number, because 100000201221 - 2²² = 99996006917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000201261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 469255 + ... + 648228.

Almost surely, 2^100000201221 is an apocalyptic number.

It is an amenable number.

100000201221 is a deficient number, since it is larger than the sum of its proper divisors (47713303835).

100000201221 is a wasteful number, since it uses less digits than its factorization.

100000201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117713 (or 1117710 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 100000201221 its reverse (122102000001), we get a palindrome (222102201222).

The spelling of 100000201221 in words is "one hundred billion, two hundred one thousand, two hundred twenty-one".