11112424021 has 4 divisors (see below), whose sum is σ = 11470889344. Its totient is φ = 10753958700.

The previous prime is 11112424019. The next prime is 11112424067. The reversal of 11112424021 is 12042421111.

It is a happy number.

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 11112424021 - 2¹ = 11112424019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11112424021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112424091) 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, 179232615 + ... + 179232676.

It is an arithmetic number, because the mean of its divisors is an integer number (2867722336).

Almost surely, 2^11112424021 is an apocalyptic number.

It is an amenable number.

11112424021 is a deficient number, since it is larger than the sum of its proper divisors (358465323).

11112424021 is an equidigital number, since it uses as much as digits as its factorization.

11112424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358465322.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11112424021 its reverse (12042421111), we get a palindrome (23154845132).

The spelling of 11112424021 in words is "eleven billion, one hundred twelve million, four hundred twenty-four thousand, twenty-one".