11131421 has 4 divisors (see below), whose sum is σ = 12721632. Its totient is φ = 9541212.

The previous prime is 11131411. The next prime is 11131427. The reversal of 11131421 is 12413111.

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 11131421 - 2⁶ = 11131357 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11131396 and 11131405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795095 + ... + 795108.

It is an arithmetic number, because the mean of its divisors is an integer number (3180408).

Almost surely, 2^11131421 is an apocalyptic number.

It is an amenable number.

11131421 is a deficient number, since it is larger than the sum of its proper divisors (1590211).

11131421 is an equidigital number, since it uses as much as digits as its factorization.

11131421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590210.

The product of its digits is 24, while the sum is 14.

The square root of 11131421 is about 3336.3784257785. The cubic root of 11131421 is about 223.2801950258.

Adding to 11131421 its reverse (12413111), we get a palindrome (23544532).

The spelling of 11131421 in words is "eleven million, one hundred thirty-one thousand, four hundred twenty-one".