11113240421 has 4 divisors (see below), whose sum is σ = 11155496352. Its totient is φ = 11070984492.

The previous prime is 11113240417. The next prime is 11113240427. The reversal of 11113240421 is 12404231111.

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 11113240421 - 2² = 11113240417 is a prime.

It is a super-2 number, since 2×11113240421² (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 = 11113240393 and 11113240402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113240427) 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, 21127571 + ... + 21128096.

It is an arithmetic number, because the mean of its divisors is an integer number (2788874088).

Almost surely, 2^11113240421 is an apocalyptic number.

It is an amenable number.

11113240421 is a deficient number, since it is larger than the sum of its proper divisors (42255931).

11113240421 is an equidigital number, since it uses as much as digits as its factorization.

11113240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42255930.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11113240421 its reverse (12404231111), we get a palindrome (23517471532).

The spelling of 11113240421 in words is "eleven billion, one hundred thirteen million, two hundred forty thousand, four hundred twenty-one".