11122112221 has 8 divisors (see below), whose sum is σ = 12136853088. Its totient is φ = 10107978000.

The previous prime is 11122112201. The next prime is 11122112233. The reversal of 11122112221 is 12221122111.

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 11122112221 - 2¹⁷ = 11121981149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11122112195 and 11122112204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11122112201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112890 + ... + 187051.

It is an arithmetic number, because the mean of its divisors is an integer number (1517106636).

Almost surely, 2^11122112221 is an apocalyptic number.

11122112221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11122112221 is a deficient number, since it is larger than the sum of its proper divisors (1014740867).

11122112221 is a wasteful number, since it uses less digits than its factorization.

11122112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303323.

The product of its digits is 32, while the sum is 16.

Adding to 11122112221 its reverse (12221122111), we get a palindrome (23343234332).

The spelling of 11122112221 in words is "eleven billion, one hundred twenty-two million, one hundred twelve thousand, two hundred twenty-one".