100221011 has 4 divisors (see below), whose sum is σ = 109332024. Its totient is φ = 91110000.

The previous prime is 100220993. The next prime is 100221019. The reversal of 100221011 is 110122001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110122001 = 11 ⋅10011091.

It is a cyclic number.

It is not a de Polignac number, because 100221011 - 2²⁶ = 33112147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100221011.

It is not an unprimeable number, because it can be changed into a prime (100221019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4555490 + ... + 4555511.

It is an arithmetic number, because the mean of its divisors is an integer number (27333006).

Almost surely, 2^100221011 is an apocalyptic number.

100221011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100221011 is a deficient number, since it is larger than the sum of its proper divisors (9111013).

100221011 is an equidigital number, since it uses as much as digits as its factorization.

100221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111012.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 100221011 is about 10011.0444510051. The cubic root of 100221011 is about 464.5005791529.

Adding to 100221011 its reverse (110122001), we get a palindrome (210343012).

The spelling of 100221011 in words is "one hundred million, two hundred twenty-one thousand, eleven".