11112220021 has 8 divisors (see below), whose sum is σ = 12740517504. Its totient is φ = 9494131920.

The previous prime is 11112220019. The next prime is 11112220039. The reversal of 11112220021 is 12002221111.

11112220021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 11112220021 - 2¹ = 11112220019 is a prime.

It is a super-2 number, since 2×11112220021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112219983 and 11112220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112220121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2550010 + ... + 2554363.

It is an arithmetic number, because the mean of its divisors is an integer number (1592564688).

Almost surely, 2^11112220021 is an apocalyptic number.

It is an amenable number.

11112220021 is a deficient number, since it is larger than the sum of its proper divisors (1628297483).

11112220021 is an equidigital number, since it uses as much as digits as its factorization.

11112220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5104691.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11112220021 its reverse (12002221111), we get a palindrome (23114441132).

The spelling of 11112220021 in words is "eleven billion, one hundred twelve million, two hundred twenty thousand, twenty-one".