10001111000221 has 4 divisors (see below), whose sum is σ = 10910302909344. Its totient is φ = 9091919091100.

The previous prime is 10001111000183. The next prime is 10001111000233. The reversal of 10001111000221 is 12200011110001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10001111000221 - 2²⁹ = 10000574129309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10001111000198 and 10001111000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10001111000291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454595954545 + ... + 454595954566.

It is an arithmetic number, because the mean of its divisors is an integer number (2727575727336).

Almost surely, 2^{10001111000221} is an apocalyptic number.

10001111000221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10001111000221 is a deficient number, since it is larger than the sum of its proper divisors (909191909123).

10001111000221 is an equidigital number, since it uses as much as digits as its factorization.

10001111000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909191909122.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 10001111000221 its reverse (12200011110001), we get a palindrome (22201122110222).

The spelling of 10001111000221 in words is "ten trillion, one billion, one hundred eleven million, two hundred twenty-one", and thus it is an aban number.