11321421 has 8 divisors (see below), whose sum is σ = 15110784. Its totient is φ = 7539840.

The previous prime is 11321399. The next prime is 11321437. The reversal of 11321421 is 12412311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11321421 - 2⁵ = 11321389 is a prime.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 11321421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11321441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4605 + ... + 6621.

It is an arithmetic number, because the mean of its divisors is an integer number (1888848).

Almost surely, 2^11321421 is an apocalyptic number.

It is an amenable number.

11321421 is a deficient number, since it is larger than the sum of its proper divisors (3789363).

11321421 is a wasteful number, since it uses less digits than its factorization.

11321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891.

The product of its digits is 48, while the sum is 15.

The square root of 11321421 is about 3364.7319358308. The cubic root of 11321421 is about 224.5434098757.

Adding to 11321421 its reverse (12412311), we get a palindrome (23733732).

The spelling of 11321421 in words is "eleven million, three hundred twenty-one thousand, four hundred twenty-one".