10011221111 has 8 divisors (see below), whose sum is σ = 10055520384. Its totient is φ = 9967007160.

The previous prime is 10011221083. The next prime is 10011221123. The reversal of 10011221111 is 11112211001.

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

It is a cyclic number.

It is not a de Polignac number, because 10011221111 - 2²⁶ = 9944112247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10011221092 and 10011221101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10011221131) 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 7 ways as a sum of consecutive naturals, for example, 219836 + ... + 261438.

It is an arithmetic number, because the mean of its divisors is an integer number (1256940048).

Almost surely, 2^10011221111 is an apocalyptic number.

10011221111 is a deficient number, since it is larger than the sum of its proper divisors (44299273).

10011221111 is an equidigital number, since it uses as much as digits as its factorization.

10011221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42661.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10011221111 its reverse (11112211001), we get a palindrome (21123432112).

The spelling of 10011221111 in words is "ten billion, eleven million, two hundred twenty-one thousand, one hundred eleven".