11112444421 has 12 divisors (see below), whose sum is σ = 12120859332. Its totient is φ = 10182746496.

The previous prime is 11112444403. The next prime is 11112444433. The reversal of 11112444421 is 12444421111.

It can be written as a sum of positive squares in 6 ways, for example, as 1525293025 + 9587151396 = 39055^2 + 97914^2 .

It is not a de Polignac number, because 11112444421 - 2¹³ = 11112436229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112444401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216826 + ... + 263131.

It is an arithmetic number, because the mean of its divisors is an integer number (1010071611).

Almost surely, 2^11112444421 is an apocalyptic number.

It is an amenable number.

11112444421 is a deficient number, since it is larger than the sum of its proper divisors (1008414911).

11112444421 is a wasteful number, since it uses less digits than its factorization.

11112444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480120 (or 480107 counting only the distinct ones).

The product of its digits is 1024, while the sum is 25.

Adding to 11112444421 its reverse (12444421111), we get a palindrome (23556865532).

The spelling of 11112444421 in words is "eleven billion, one hundred twelve million, four hundred forty-four thousand, four hundred twenty-one".