11113420021 has 8 divisors (see below), whose sum is σ = 12149921664. Its totient is φ = 10081283520.

The previous prime is 11113419923. The next prime is 11113420039. The reversal of 11113420021 is 12002431111.

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

It is not a de Polignac number, because 11113420021 - 2⁷ = 11113419893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11113419977 and 11113420004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113720021) 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, 1085956 + ... + 1096141.

It is an arithmetic number, because the mean of its divisors is an integer number (1518740208).

Almost surely, 2^11113420021 is an apocalyptic number.

11113420021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11113420021 is a deficient number, since it is larger than the sum of its proper divisors (1036501643).

11113420021 is a wasteful number, since it uses less digits than its factorization.

11113420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2182571.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11113420021 its reverse (12002431111), we get a palindrome (23115851132).

It can be divided in two parts, 11113 and 420021, that added together give a palindrome (431134).

The spelling of 11113420021 in words is "eleven billion, one hundred thirteen million, four hundred twenty thousand, twenty-one".