1000011100221 has 24 divisors (see below), whose sum is σ = 1695428518784. Its totient is φ = 555990726240.

The previous prime is 1000011100217. The next prime is 1000011100229. The reversal of 1000011100221 is 1220011100001.

It is a happy number.

It is not a de Polignac number, because 1000011100221 - 2² = 1000011100217 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000011100229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 214500265 + ... + 214504926.

Almost surely, 2^{1000011100221} is an apocalyptic number.

It is an amenable number.

1000011100221 is a deficient number, since it is larger than the sum of its proper divisors (695417418563).

1000011100221 is a wasteful number, since it uses less digits than its factorization.

1000011100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429005241 (or 429005238 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 1000011100221 its reverse (1220011100001), we get a palindrome (2220022200222).

The spelling of 1000011100221 in words is "one trillion, eleven million, one hundred thousand, two hundred twenty-one".