11112421 has 2 divisors, whose sum is σ = 11112422. Its totient is φ = 11112420.

The previous prime is 11112403. The next prime is 11112433. The reversal of 11112421 is 12421111.

11112421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9235521 + 1876900 = 3039^2 + 1370^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112421 - 2¹¹ = 11110373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556210 + 5556211.

It is an arithmetic number, because the mean of its divisors is an integer number (5556211).

Almost surely, 2^11112421 is an apocalyptic number.

It is an amenable number.

11112421 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112421 is an equidigital number, since it uses as much as digits as its factorization.

11112421 is an evil number, because the sum of its binary digits is even.

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

The square root of 11112421 is about 3333.5298108762. The cubic root of 11112421 is about 223.1530851773.

Adding to 11112421 its reverse (12421111), we get a palindrome (23533532).

It can be divided in two parts, 111 and 12421, that multiplied together give a palindrome (1378731).

The spelling of 11112421 in words is "eleven million, one hundred twelve thousand, four hundred twenty-one".