10000011221 has 8 divisors (see below), whose sum is σ = 10193295960. Its totient is φ = 9806897152.

The previous prime is 10000011211. The next prime is 10000011227. The reversal of 10000011221 is 12211000001.

It can be written as a sum of positive squares in 4 ways, for example, as 5024824996 + 4975186225 = 70886^2 + 70535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10000011221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10000011199 and 10000011208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000011227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78965 + ... + 161973.

It is an arithmetic number, because the mean of its divisors is an integer number (1274161995).

Almost surely, 2^10000011221 is an apocalyptic number.

It is an amenable number.

10000011221 is a deficient number, since it is larger than the sum of its proper divisors (193284739).

10000011221 is an equidigital number, since it uses as much as digits as its factorization.

10000011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85335.

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

Adding to 10000011221 its reverse (12211000001), we get a palindrome (22211011222).

It can be divided in two parts, 1000001 and 1221, that multiplied together give a palindrome (1221001221).

The spelling of 10000011221 in words is "ten billion, eleven thousand, two hundred twenty-one".